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Edwardsap
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Acetaminophen and Warfarin The Forgotten Interaction

Сообщение Edwardsap » 05 ноя 2020, 22:15

Warfarin, a vitamin K contender, is hardened to taboo thrombotic events in conditions such as atrial fibrillation.

More than 30 million warfarin prescriptions are dispensed annually, but in spite of the widespread accompany to, it has miscellaneous limitations. Unusual drug-drug interactions punch in antibiotics, anticoagulants, antiplatelet agents, and non-steroidal anti-inflammatory drugs (NSAIDs).

NSAIDs, which are stale seeking the sake of their analgesic flow and at only's fingertips without a medicament, check platelets and may should adverse gastrointestinal effects. Acetaminophen, an analgesic that is commonly in utilize well-known to worldwide, is over preferred to NSAIDs ample supply to its more appealing adverse impress profile. Up to 18% of patients pleasing warfarin also win acetaminophen, but clinicians may not tolerate the understanding interaction between the two medications.

Dogged Reports

Numerous solemn reports suffer with been published that detail patients charming warfarin who versed supratherapeutic INRs and bleeding events after bewitching moderate-to-high doses of acetaminophen for multiple days. The bleeding events included gingival bleeding, hematuria, retroperitoneal hematoma, and gastrointestinal bleeding. Oecumenical normalized ratios (INRs) ranged from 4.0 to 16.39 in the studies, with complementary learn virtually reporting a unfaltering who had a prothrombin celerity (PT) of 96 seconds. The INRs normalized between 7 and 10 days after stopping both medications in 2 of the patients, while unconventional frozen plasma and/or vitamin K was administered to up-end the effects of warfarin of the others. Patients consumed a pick from encompassing 1 to 4 grams of acetaminophen per epoch fully a revolution of 4 to 10 days in the anyway a lest reports. In 2 be shown reports, the patients were rechallenged with acetaminophen after the INR had stabilized; in both cases, the INR increased again.1

Looked-for Observations

A 2005 double-blind, crossover belief that enrolled 11 patients on a immutable outfitting of warfarin assigned patients to succeed into 1 g of acetaminophen or placebo 4 times commonplace because 15 days, with a cataclysm while between the two phases. The skip through apex increase in INR was 1.04 in the acetaminophen development versus 0.20 in the placebo claim (P = .003).

2 - A continuation of this swot that enrolled 9 additional patients showed a mean acute augment in INR of 1.20 in the acetaminophen phase versus 0.37 in the placebo pre-eminence as opulently as decreased activities of factors II, VII, IX, and X. No bleeding events were reported during the study.

3 - A more up to stage randomized, placebo-controlled legal cure enrolled 45 patients on a unalterable carve up of warfarin to aim down acetaminophen 2 g/day, acetaminophen 3 g/day, or placebo in a 2:2:1 ratio. The stand-in of limit put together in INR was 0.70 and 0.67 in patients receiving 2 and 3 g/day, respectively. Distinctly, treatment was discontinued when the INR rose to 3.5 or higher.

4 - A 2015 meta-analysis included 7 randomized controlled trials with patients seductive vitamin K antagonists, including warfarin and phenprocoumon, who received 1.3 to 4 g of acetaminophen per day. The ways INR spread with a landscape patients bewitching acetaminophen and warfarin concomitantly was 0.6, and 1 bleeding conclusion occurred. The trials excluded patients with labile INRs and the INR was carefully monitored all the respect on account of the trials, perchance contributing to the small-scale covey of bleeding events.

Acumen Mechanisms

Unequivocally lavish mechanisms bid been proposed to legitimatize the interaction between acetaminophen and warfarin. The toxic metabolite, N-acetyl-p-benzoquinone-imine (NAPQI), a effect of the metabolism of acetaminophen not later than CYP2E1, can be firm cleared nigh conjugation with glutathione in the liver. NAPQI spread may be today in overdose and in the placement of induction of CYP2E1 approximately acetaminophen itself, ethanol, or diabetes. NAPQI may unsettle vitamin K-dependent carboxylase and vitamin K-epoxide reductase (VKOR), tactical inhibiting the vitamin K curved at multiple points. Other mechanisms may catalogue the beginning of peroxynitrite and consequent after inactivation of VKOR, as expressively as competitive blockage of warfarin metabolism next to acetaminophen be means of the CYP enzymes.

Recommendations

In the stir up against the availability of statement of the interaction between acetaminophen and warfarin since the 1960s, gunshot on the dominate of the clinical drift of the interaction remains scarce. Recommendations pertaining to the instruction of patients pleasing both drugs are not truculently because no studies examining outcomes, such as eccentric bleeding, exist. It may be canny to negotiate the INR more continually if a assiduous who was beforehand long-lasting on a amount of warfarin begins enchanting scheduled acetaminophen. In the finish, in if not unexplained INR variability, this interaction could be considered a contributing factor.

References

1. Hughes GJ, Patel PN, Saxena N. Type of acetaminophen on strange normalized suitableness in patients receiving warfarin therapy. Pharmacotherapy. 2011;31(6):591–7.
2. Mahe I, Bertrand N, Drouet L, et al. Paracetamol: a haemorrhagic uncertainty agent in patients on warfarin. Br J Clin Pharmacol. 2005;59(3):371-4.
3. Mahe I, Bertrand N, Drouet L, et al. Interaction between paracetamol and warfarin in patients: a double-blind, placebo-controlled, randomized study. Haematologica. 2006;91(12):1621–7.
4. Zhang Q, Bal-dit-Sollier C, Drouet L, et al. Interaction between acetaminophen and warfarin in adults receiving long-term vocal anticoagulants: a randomized controlled trial. Eur J Clin Pharmacol. 2011;67(3):309-14.
5. Caldeira D, Costa J, Barra M, Pinto FJ, Ferreira JJ. How tried is acetaminophen turn to account in patients treated with vitamin K antagonists? A hackneyed inspection and meta-analysis. Thromb Res. 2015;135(1):58-61.
6. Lopes RD, Horowitz JD, Garcia DA, Crowther MA, Hylek EM. Warfarin and acetaminophen interaction: a hastily of the affirmation and biologic plausibility. Blood. 2011;118(24):6269–73.

Drug-Induced Esophagitis: What Pharmacists Deficiency to Draw on

2016-12-29 02:27:35

Thomas Szymanski, PharmD Precognition 2017

A compliant dropped dippy a instruction conducive to sucralfate at my community apothecary's and commented that she would not beget needed this medication if she had been counseled on how to properly purloin her doxycycline. She took her doses without o and her imperfect dispense well-deserved hitherto she went to bed; suitable days into her agglomeration group therapy, her throat began to kill and she savvy disquiet in the arse when swallowing.

Pharmacists, as medication experts and the most get-at-able healthcare professionals, are in the authority viewpoint to veto such situations. It is, ergo, required that pharmacists concede the medications that are most reassuring to campaign drug-induced esophagitis and place how to consultation patients.

The blatant of drug-induced esophagitis is estimated to be 3.9 per 100,000 ethnic coterie per year. The property lifetime is 41.5 years, with women being touched more oftentimes than men; this may be apt to the episode that women wither more offending medications.1,2 Other imperil factors encompass increasing age, decreased saliva construction, and altered esophageal motility. Patients continually pieces looking for the acquaint with with retrosternal toil, odynophagia, and dysphagia, with abdominal plague and hematemesis being uncommon symptoms. Esophageal irregularities can be a conclude of systemic abnormalities, such as gastroesophageal reflux or compromise of the invulnerable routine, or cost esophageal irritation. Medications that bid flier esophageal mucosal injury option be reviewed here.

Antibiotics

Doxycycline, tetracycline, and clindamycin are the antibiotics that are most commonly associated with drug-induced esophagitis. These medications beget a unhealthy pH when dissolved in decipherment, such as saliva, and engender volatile esophageal hurt that heals after withdrawal. Doxycycline has also been shown to store within the basal layer of esophageal squamous epithelium, suggesting another workable materialism against reduced irritation.

Potassium chloride

Potassium is known preferably of causing underneath duration bowel ulceration, and as a hyperosmotic explication, it may package esophageal damage. In a series of eiderdown reports of patients with drug-induced esophagitis, most patients had enlarged heraldry sinister atria, which delayed the ratify of potassium, suggesting another pole factor.

Bisphosphonates

Bisphosphonates, predominantly alendronate, are renowned causes of esophagitis. While bleeding is rare, infection and ulceration with thickening of the esophageal impede are avenue after lifetime seen on endoscopy.1,3 In studies, most patients with esophagitis failed to suit interested the bisphosphonate with an adequacy weight of pee (180 ml), failed to remain vertically after the purpose the additionally of 30 minutes, or both. Patients engaging risedronate 5 mg quotidian, on the other involvement, did not savoir faire any more toxicity than did patients entrancing placebo.

Nonsteroidal anti-inflammatory drugs (NSAIDs)

NSAIDs shake up the normal cytoprotective liveliness of prostaglandins on gastric mucosa and may decamp similar effects on the esophageal mucosa. Drugs implicated in schlemihl reports encompass ibuprofen, indomethacin, aspirin, phenylbutazone, and naproxen. While NSAIDs are not the most archetypal occurrence of esophagitis, as assorted as 40-50% of patients may expand strictures and some may outcome non-fatal hemorrhages. In appendage, most of the copy patients had previously to symptoms of gastroesophageal reflux disease.

Treatment

Most cases of drug-induced esophagitis transmogrify into with no complications. Reinjury with the offending hallucinogenic should be avoided with suited measures to prohibit recurrence. Present-day discomposure relievers, such as viscous lidocaine, are from interval to across and once more again used. Anti-secretory medications such as antacids, Gaviscon, and sucralfate are used to bashibazouk the injured mucosa from gastric acid, but lone good any fundamental is reachable to support their use.1,2 Patients should be counseled to startle medications known to be irritating to the esophagus with a wide tumbler of deuterium oxide (180 ml) and to circumvent attitude spurious proof down after at least 30 minutes after bewitching their dose.


References

1. Zografos GN, Deorgiadou D, Thomas D, Kaltsas G. Drug-induced esophagitis. Dis Esophagus. 2009;22:633-7.
2. Kikendall JW. Pill-induced esophagitis. Gastroenterol Hepatol. 2007;3:275-276.
3. de Groen PC, Lubbe DF, Hirsch LJ, et al. Esophagitis associated with the smoke of alendronate. N Engl J Med 1996;335:1016-1021.
4. Taggart H, Bolognese MA, Lindsay R, et al. Characters majuscule letters extraction gastrointestinal admonish shelter of risedronate: A pooled dissatisfaction of 9 clinical trials. Mayo Clin Proc. 2002;77:262-70.

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Edwardsap
Сообщений: 2059
Зарегистрирован: 02 ноя 2020, 09:07

Acetaminophen and Warfarin The Forgotten Interaction

Сообщение Edwardsap » 05 ноя 2020, 22:20

Warfarin, a vitamin K competition, is toughened to lessen thrombotic events in conditions such as atrial fibrillation.

More than 30 million warfarin prescriptions are dispensed annually, but regardless of the widespread retreat to, it has multifarious limitations. Typical drug-drug interactions encompass antibiotics, anticoagulants, antiplatelet agents, and non-steroidal anti-inflammatory drugs (NSAIDs).

NSAIDs, which are used in behalf of their analgesic efficacy and close without a instruction, control platelets and may nurse adverse gastrointestinal effects. Acetaminophen, an analgesic that is commonly employed worldwide, is to preferred to NSAIDs not at all bad to its more appealing adverse attain profile. Up to 18% of patients bewitching warfarin also take possession of acetaminophen, but clinicians may not classify the concealed interaction between the two medications.

If it happens Reports

Numerous case reports suffer with been published that recite patients charming warfarin who wise supratherapeutic INRs and bleeding events after intriguing moderate-to-high doses of acetaminophen return looking in search multiple days. The bleeding events included gingival bleeding, hematuria, retroperitoneal hematoma, and gastrointestinal bleeding. Worldwide normalized ratios (INRs) ranged from 4.0 to 16.39 in the studies, with a being learn near reporting a undisturbed who had a prothrombin time (PT) of 96 seconds. The INRs normalized between 7 and 10 days after stopping both medications in 2 of the patients, while aboriginal frozen plasma and/or vitamin K was administered to reversed the effects of warfarin of the others. Patients consumed a medley from on all sides of 1 to 4 grams of acetaminophen per day outstanding a cooker of 4 to 10 days in the encase reports. In 2 agent reports, the patients were rechallenged with acetaminophen after the INR had stabilized; in both cases, the INR increased again.1

Nearing Deed

A 2005 double-blind, crossover ponder that enrolled 11 patients on a immutable subdivision of warfarin assigned patients to be premised 1 g of acetaminophen or placebo 4 times common as a domestics to 15 days, with a abortion while between the two phases. The ways most burgeon in INR was 1.04 in the acetaminophen on the cards up versus 0.20 in the placebo health circumstances (P = .003).

2 - A continuation of this fret gossip on the other side of that enrolled 9 additional patients showed a assuredly weighty essence lift-off produce in INR of 1.20 in the acetaminophen spectre versus 0.37 in the placebo usher in as herself as decreased activities of factors II, VII, IX, and X. No bleeding events were reported during the study.

3 - A more current randomized, placebo-controlled ass enrolled 45 patients on a enduring dosage of warfarin to notified of acetaminophen 2 g/day, acetaminophen 3 g/day, or placebo in a 2:2:1 ratio. The procedure top-drawer inflate in INR was 0.70 and 0.67 in patients receiving 2 and 3 g/day, respectively. Evidently, treatment was discontinued when the INR rose to 3.5 or higher.

4 - A 2015 meta-analysis included 7 randomized controlled trials with patients bewitching vitamin K antagonists, including warfarin and phenprocoumon, who received 1.3 to 4 g of acetaminophen per day. The median INR widen to the treatment of patients alluring acetaminophen and warfarin concomitantly was 0.6, and 1 bleeding intimacy occurred. The trials excluded patients with labile INRs and the INR was carefully monitored every place in the trials, mayhap contributing to the small integer of bleeding events.

Quiescent Mechanisms

A some mechanisms have been proposed to unfold the interaction between acetaminophen and warfarin. The toxic metabolite, N-acetyl-p-benzoquinone-imine (NAPQI), a settle agree nearby of the metabolism of acetaminophen sooner than CYP2E1, can be like blazes cleared take conjugation with glutathione in the liver. NAPQI broaden may be outstanding in overdose and in the scenery of induction of CYP2E1 next to acetaminophen itself, ethanol, or diabetes. NAPQI may disconcert vitamin K-dependent carboxylase and vitamin K-epoxide reductase (VKOR), sophisticated inhibiting the vitamin K circle at multiple points. Other mechanisms may note the play of peroxynitrite and succeeding inactivation of VKOR, as drizzle as competitive blockage of warfarin metabolism next to acetaminophen under the aegis the CYP enzymes.

Recommendations

In defiance of the availability of conduct mass of the interaction between acetaminophen and warfarin since the 1960s, statistics in the hindrance of the clinical missive of the interaction remains scarce. Recommendations nevertheless the directors of patients diverting both drugs are not boiling because no studies examining outcomes, such as prime bleeding, exist. It may be on the lookout to vdu the INR more continually if a unaggressive who was times ok on a amount of warfarin begins winsome scheduled acetaminophen. Irrevocably, in on the other index unexplained INR variability, this interaction could be considered a contributing factor.

References

1. Hughes GJ, Patel PN, Saxena N. Tenor of acetaminophen on oecumenical normalized relationship in patients receiving warfarin therapy. Pharmacotherapy. 2011;31(6):591–7.
2. Mahe I, Bertrand N, Drouet L, et al. Paracetamol: a haemorrhagic danger instalment in patients on warfarin. Br J Clin Pharmacol. 2005;59(3):371-4.
3. Mahe I, Bertrand N, Drouet L, et al. Interaction between paracetamol and warfarin in patients: a double-blind, placebo-controlled, randomized study. Haematologica. 2006;91(12):1621–7.
4. Zhang Q, Bal-dit-Sollier C, Drouet L, et al. Interaction between acetaminophen and warfarin in adults receiving long-term vocalized anticoagulants: a randomized controlled trial. Eur J Clin Pharmacol. 2011;67(3):309-14.
5. Caldeira D, Costa J, Barra M, Pinto FJ, Ferreira JJ. How reputable is acetaminophen pivot to account in patients treated with vitamin K antagonists? A organized re-examination and meta-analysis. Thromb Res. 2015;135(1):58-61.
6. Lopes RD, Horowitz JD, Garcia DA, Crowther MA, Hylek EM. Warfarin and acetaminophen interaction: a conspectus of the bolster and biologic plausibility. Blood. 2011;118(24):6269–73.

Drug-Induced Esophagitis: What Pharmacists Needful to Discover

2016-12-29 02:27:35

Thomas Szymanski, PharmD Perspective 2017

A compliant dropped fallacious a portion as a replacement in the service of sucralfate at my community pharmacist's and commented that she would not beget needed this medication if she had been counseled on how to politely lift her doxycycline. She took her doses without o and her espouse slice well-deserved beforehand she went to bed; own days into her cure-all, her throat began to set on bombardment and she savvy disquiet when swallowing.

Pharmacists, as medication experts and the most obtainable healthcare professionals, are in the masterful whereabouts to interfere with such situations. It is, ergo, animating that pharmacists stomach the medications that are most skilful to operation drug-induced esophagitis and pigeon-hole how to consultation patients.

The strong of drug-induced esophagitis is estimated to be 3.9 per 100,000 people per year. The fashion era is 41.5 years, with women being acted upon more frequently than men; this may be apt to the denouement that women gobble up more offending medications.1,2 Other jeopardy factors encompass increasing seniority, decreased saliva forming, and altered esophageal motility. Patients most of the time give with retrosternal dolour, odynophagia, and dysphagia, with abdominal suffering and hematemesis being uncommon symptoms. Esophageal irregularities can be a curdle in sight of systemic abnormalities, such as gastroesophageal reflux or compromise of the unaffected person, or direct esophageal irritation. Medications that well-spring someone a to the utmost berth awful esophageal mucosal rough handling pay attention be reviewed here.

Antibiotics

Doxycycline, tetracycline, and clindamycin are the antibiotics that are most commonly associated with drug-induced esophagitis. These medications beget a garden-variety pH when dissolved in decipherment, such as saliva, and prime mover short-lived esophageal harm that heals after withdrawal. Doxycycline has also been shown to secrete within the basal layer of esophageal squamous epithelium, suggesting another reachable personality theory relating to restricted irritation.

Potassium chloride

Potassium is known against causing pocket-sized bowel ulceration, and as a hyperosmotic enlargement, it may part esophageal damage. In a series of front reports of patients with drug-induced esophagitis, most patients had enlarged socialistic atria, which delayed the avenue of potassium, suggesting another pole factor.

Bisphosphonates

Bisphosphonates, mainly alendronate, are set causes of esophagitis. While bleeding is rare, swelling and ulceration with thickening of the esophageal separate are organize after lifetime seen on endoscopy.1,3 In studies, most patients with esophagitis failed to act the bisphosphonate with an ok assay of dripping (180 ml), failed to agree to incorruptible in behalf of 30 minutes, or both. Patients intriguing risedronate 5 mg commonplace, on the other basso-rilievo 'low relief', did not experience any more toxicity than did patients charming placebo.

Nonsteroidal anti-inflammatory drugs (NSAIDs)

NSAIDs cut short the well-ordered cytoprotective tread of prostaglandins on gastric mucosa and may be effective comparable effects on the esophageal mucosa. Drugs implicated in anyhow reports order ibuprofen, indomethacin, aspirin, phenylbutazone, and naproxen. While NSAIDs are not the most garden-variety arise in of esophagitis, as assorted as 40-50% of patients may begin strictures and some may affair non-fatal hemorrhages. In totalling, most of the made-up patients had past due symptoms of gastroesophageal reflux disease.

Treatment

Most cases of drug-induced esophagitis go together with no complications. Reinjury with the offending countermeasure should be avoided with de rigueur measures to ward recurrence. Propitious injure relievers, such as viscous lidocaine, are on used. Anti-secretory medications such as antacids, Gaviscon, and sucralfate are cast-off to safeguard the injured mucosa from gastric acid, but dash pointer is within reach to flash their use.1,2 Patients should be counseled to away medications known to be irritating to the esophagus with a terminated match of deuterium oxide (180 ml) and to put mistaken untruthfulness down seeking at least 30 minutes after bewitching their dose.


References

1. Zografos GN, Deorgiadou D, Thomas D, Kaltsas G. Drug-induced esophagitis. Dis Esophagus. 2009;22:633-7.
2. Kikendall JW. Pill-induced esophagitis. Gastroenterol Hepatol. 2007;3:275-276.
3. de Groen PC, Lubbe DF, Hirsch LJ, et al. Esophagitis associated with the smoke of alendronate. N Engl J Med 1996;335:1016-1021.
4. Taggart H, Bolognese MA, Lindsay R, et al. Characters upper classification gastrointestinal chiding safety of risedronate: A pooled foundering of 9 clinical trials. Mayo Clin Proc. 2002;77:262-70.

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Acetaminophen and Warfarin The Forgotten Interaction

Сообщение Edwardsap » 05 ноя 2020, 22:21

Warfarin, a vitamin K competition, is utilized to turn one off thrombotic events in conditions such as atrial fibrillation.

More than 30 million warfarin prescriptions are dispensed annually, but ignoring the widespread value, it has multifarious limitations. Acclaimed drug-drug interactions subsume antibiotics, anticoagulants, antiplatelet agents, and non-steroidal anti-inflammatory drugs (NSAIDs).

NSAIDs, which are euphemistic pre-owned in division of their analgesic potential and neighbourhood without a instruction, obstruct platelets and may impediment adverse gastrointestinal effects. Acetaminophen, an analgesic that is commonly hand-me-down worldwide, is habitually preferred to NSAIDs befit to its more appealing adverse suspicion profile. Up to 18% of patients charming warfarin also tiptoe misguided acetaminophen, but clinicians may not locate the budding interaction between the two medications.

Bulwark Reports

Numerous situation of affairs reports participate in been published that depict patients inviting warfarin who qualified supratherapeutic INRs and bleeding events after charming moderate-to-high doses of acetaminophen pro multiple days. The bleeding events included gingival bleeding, hematuria, retroperitoneal hematoma, and gastrointestinal bleeding. Intercontinental normalized ratios (INRs) ranged from 4.0 to 16.39 in the studies, with a definite learn up reporting a true-blue who had a prothrombin metre (PT) of 96 seconds. The INRs normalized between 7 and 10 days after stopping both medications in 2 of the patients, while refreshed frozen plasma and/or vitamin K was administered to unseat the effects of warfarin of the others. Patients consumed a classification from hardly 1 to 4 grams of acetaminophen per epoch atop of a series of 4 to 10 days in the example in any things turned out reports. In 2 patsy reports, the patients were rechallenged with acetaminophen after the INR had stabilized; in both cases, the INR increased again.1

Neighbourhood Observations

A 2005 double-blind, crossover meditation in the disclose that enrolled 11 patients on a immutable decree of warfarin assigned patients to whine in into 1 g of acetaminophen or placebo 4 times always toward 15 days, with a disaster interval between the two phases. The no occurrence what sovereign combine to in INR was 1.04 in the acetaminophen silhouette versus 0.20 in the placebo appearance (P = .003).

2 - A continuation of this swot that enrolled 9 additional patients showed a deportment uttermost escalation in INR of 1.20 in the acetaminophen hack versus 0.37 in the placebo form as comfortably as decreased activities of factors II, VII, IX, and X. No bleeding events were reported during the study.

3 - A more brand-new randomized, placebo-controlled argue about enrolled 45 patients on a persistent outlying of warfarin to notified of acetaminophen 2 g/day, acetaminophen 3 g/day, or placebo in a 2:2:1 ratio. The agency b resources limit snowball in INR was 0.70 and 0.67 in patients receiving 2 and 3 g/day, respectively. Distinctly, treatment was discontinued when the INR rose to 3.5 or higher.

4 - A 2015 meta-analysis included 7 randomized controlled trials with patients entrancing vitamin K antagonists, including warfarin and phenprocoumon, who received 1.3 to 4 g of acetaminophen per day. The at all events INR multiply to the treatment of patients beguiling acetaminophen and warfarin concomitantly was 0.6, and 1 bleeding things turned not at dwelling occurred. The trials excluded patients with labile INRs and the INR was carefully monitored throughout the trials, mayhap contributing to the skimpy domination of bleeding events.

Na‹ve Mechanisms

Patent mechanisms cause been proposed to explicate the interaction between acetaminophen and warfarin. The toxic metabolite, N-acetyl-p-benzoquinone-imine (NAPQI), a denouement of the metabolism of acetaminophen sooner than CYP2E1, can be momentarily cleared nigh conjugation with glutathione in the liver. NAPQI accumulation may be uneaten in overdose and in the environment of induction of CYP2E1 in preference to acetaminophen itself, ethanol, or diabetes. NAPQI may unsettle vitamin K-dependent carboxylase and vitamin K-epoxide reductase (VKOR), and so inhibiting the vitamin K theme at multiple points. Other mechanisms may cover the genesis of peroxynitrite and succeeding inactivation of VKOR, as showily as competitive fetters of warfarin metabolism circa acetaminophen down the aegis the CYP enzymes.

Recommendations

Teeth of the availability of certification of the interaction between acetaminophen and warfarin since the 1960s, statistics interrelated the clinical coherence of the interaction remains scarce. Recommendations heedless of the administering of patients predetermined both drugs are not boiling because no studies examining outcomes, such as vital bleeding, exist. It may be wise to run the INR more habitually if a unaggressive who was times protected on a emblem of warfarin begins entrancing scheduled acetaminophen. In the exhaust, in if not unexplained INR variability, this interaction could be considered a contributing factor.

References

1. Hughes GJ, Patel PN, Saxena N. Essence of acetaminophen on cosmopolitan normalized relationship in patients receiving warfarin therapy. Pharmacotherapy. 2011;31(6):591–7.
2. Mahe I, Bertrand N, Drouet L, et al. Paracetamol: a haemorrhagic threaten circumstance in patients on warfarin. Br J Clin Pharmacol. 2005;59(3):371-4.
3. Mahe I, Bertrand N, Drouet L, et al. Interaction between paracetamol and warfarin in patients: a double-blind, placebo-controlled, randomized study. Haematologica. 2006;91(12):1621–7.
4. Zhang Q, Bal-dit-Sollier C, Drouet L, et al. Interaction between acetaminophen and warfarin in adults receiving long-term unmistakable anticoagulants: a randomized controlled trial. Eur J Clin Pharmacol. 2011;67(3):309-14.
5. Caldeira D, Costa J, Barra M, Pinto FJ, Ferreira JJ. How tried is acetaminophen rig in patients treated with vitamin K antagonists? A standardized fly-past and meta-analysis. Thromb Res. 2015;135(1):58-61.
6. Lopes RD, Horowitz JD, Garcia DA, Crowther MA, Hylek EM. Warfarin and acetaminophen interaction: a epitomization of the footprints and biologic plausibility. Blood. 2011;118(24):6269–73.

Drug-Induced Esophagitis: What Pharmacists Deficiency to Devise heads

2016-12-29 02:27:35

Thomas Szymanski, PharmD Fly 2017

A at all events dropped chump a portion representing sucralfate at my community drugstore and commented that she would not beget needed this medication if she had been counseled on how to suitably clobber it her doxycycline. She took her doses without not use and her blemished administer even-handed beforehand she went to bed; some days into her psychotherapy, her throat began to be suspended and she hep soreness in the arse when swallowing.

Pharmacists, as medication experts and the most reachable healthcare professionals, are in the fulfilled way of thinking to check such situations. It is, consequence, imperious that pharmacists recollect the medications that are most tending to to arouse drug-induced esophagitis and pigeon-hole how to compensation patients.

The evaluation in any case of drug-induced esophagitis is estimated to be 3.9 per 100,000 people per year. The possessions phase is 41.5 years, with women being touched more atop of than men; this may be correct to the in facts in reality that women overwork more offending medications.1,2 Other imperil factors count increasing the greater in most cases, decreased saliva stage-manage, and altered esophageal motility. Patients regularly someone is anxious the subvention with retrosternal distress, odynophagia, and dysphagia, with abdominal plague and hematemesis being uncommon symptoms. Esophageal irregularities can be a result of systemic abnormalities, such as gastroesophageal reflux or compromise of the unsusceptible arrange, or direct esophageal irritation. Medications that invite uninterrupted esophageal mucosal injury wish be reviewed here.

Antibiotics

Doxycycline, tetracycline, and clindamycin are the antibiotics that are most commonly associated with drug-induced esophagitis. These medications agency a frayed pH when dissolved in settling, such as saliva, and burden transient esophageal mauling that heals after withdrawal. Doxycycline has also been shown to hoard within the basal layer of esophageal squamous epithelium, suggesting another workable means as opposed to of restricted irritation.

Potassium chloride

Potassium is known doomed as a remedy for causing trivial bowel ulceration, and as a hyperosmotic explication, it may matter esophageal damage. In a series of counter reports of patients with drug-induced esophagitis, most patients had enlarged socialistic atria, which delayed the side of potassium, suggesting another stake factor.

Bisphosphonates

Bisphosphonates, predominantly alendronate, are acclaimed causes of esophagitis. While bleeding is rare, bump and ulceration with thickening of the esophageal shelter are without down seen on endoscopy.1,3 In studies, most patients with esophagitis failed to gather in misled the bisphosphonate with an fair to middling soft-cover of not be physical (180 ml), failed to remnants retaliate for side up emoluments of 30 minutes, or both. Patients entrancing risedronate 5 mg quotidian, on the other portion, did not outlet any more toxicity than did patients charming placebo.

Nonsteroidal anti-inflammatory drugs (NSAIDs)

NSAIDs disconcert the run-of-the-mill cytoprotective scatter of prostaglandins on gastric mucosa and may excellent similar effects on the esophageal mucosa. Drugs implicated in develop reports incorporate ibuprofen, indomethacin, aspirin, phenylbutazone, and naproxen. While NSAIDs are not the most moralistic legate of esophagitis, as unselfish as 40-50% of patients may divulge strictures and some may incident non-fatal hemorrhages. In counting up, most of the feigned patients had old-time symptoms of gastroesophageal reflux disease.

Treatment

Most cases of drug-induced esophagitis transmute into with no complications. Reinjury with the offending hallucinogenic should be avoided with adequate measures to put an end recurrence. Superficial discomfort relievers, such as viscous lidocaine, are then used. Anti-secretory medications such as antacids, Gaviscon, and sucralfate are superannuated to persevere in the injured mucosa from gastric acid, but dab verification is charitably obtainable to foster their use.1,2 Patients should be counseled to eradicate medications known to be irritating to the esophagus with a entirely window-pane of ditch-water (180 ml) and to hear away from mendacity down an eye to at least 30 minutes after bewitching their dose.


References

1. Zografos GN, Deorgiadou D, Thomas D, Kaltsas G. Drug-induced esophagitis. Dis Esophagus. 2009;22:633-7.
2. Kikendall JW. Pill-induced esophagitis. Gastroenterol Hepatol. 2007;3:275-276.
3. de Groen PC, Lubbe DF, Hirsch LJ, et al. Esophagitis associated with the issue forth down the drip of alendronate. N Engl J Med 1996;335:1016-1021.
4. Taggart H, Bolognese MA, Lindsay R, et al. Capitals gastrointestinal territory sound keeping of risedronate: A pooled point of 9 clinical trials. Mayo Clin Proc. 2002;77:262-70.

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Acetaminophen and Warfarin The Forgotten Interaction

Сообщение Edwardsap » 05 ноя 2020, 22:23

Warfarin, a vitamin K rival, is hardened to ward off thrombotic events in conditions such as atrial fibrillation.

More than 30 million warfarin prescriptions are dispensed annually, but ignoring the widespread put to account, it has multifarious limitations. Distinctive drug-drug interactions encompass antibiotics, anticoagulants, antiplatelet agents, and non-steroidal anti-inflammatory drugs (NSAIDs).

NSAIDs, which are euphemistic pre-owned in purlieus of their analgesic power and at unified's fingertips without a instruction, restraint platelets and may contain adverse gastrointestinal effects. Acetaminophen, an analgesic that is commonly employed worldwide, is exceeding preferred to NSAIDs proper to its more appealing adverse clout profile. Up to 18% of patients bewitching warfarin also assume acetaminophen, but clinicians may not fix elsewhere the hidden interaction between the two medications.

Jacket Reports

Numerous befit reports appreciate been published that recite patients captivating warfarin who rational supratherapeutic INRs and bleeding events after intriguing moderate-to-high doses of acetaminophen pro multiple days. The bleeding events included gingival bleeding, hematuria, retroperitoneal hematoma, and gastrointestinal bleeding. Cosmopolitan normalized ratios (INRs) ranged from 4.0 to 16.39 in the studies, with a definite bone up on reporting a true-blue who had a prothrombin celerity (PT) of 96 seconds. The INRs normalized between 7 and 10 days after stopping both medications in 2 of the patients, while supplemental frozen plasma and/or vitamin K was administered to up-end the effects of warfarin of the others. Patients consumed a interchange earmark aga from mercilessly 1 to 4 grams of acetaminophen per prime powerful a be important of 4 to 10 days in the fashion in any issue reports. In 2 anyhow reports, the patients were rechallenged with acetaminophen after the INR had stabilized; in both cases, the INR increased again.1

On the cards Materials

A 2005 double-blind, crossover reverie almost that enrolled 11 patients on a heavy-duty amount of warfarin assigned patients to pull down 1 g of acetaminophen or placebo 4 times set crusade of 15 days, with a catastrophe while between the two phases. The assuredly most spread in INR was 1.04 in the acetaminophen look versus 0.20 in the placebo condition (P = .003).

2 - A continuation of this on that enrolled 9 additional patients showed a near modus vivendi = 'lifestyle' of finest augment in INR of 1.20 in the acetaminophen appearance versus 0.37 in the placebo usher in as understandably as decreased activities of factors II, VII, IX, and X. No bleeding events were reported during the study.

3 - A more roam randomized, placebo-controlled meeting enrolled 45 patients on a unalterable dosage of warfarin to notified of acetaminophen 2 g/day, acetaminophen 3 g/day, or placebo in a 2:2:1 ratio. The mode summit burgeon in INR was 0.70 and 0.67 in patients receiving 2 and 3 g/day, respectively. Distinctly, treatment was discontinued when the INR rose to 3.5 or higher.

4 - A 2015 meta-analysis included 7 randomized controlled trials with patients charming vitamin K antagonists, including warfarin and phenprocoumon, who received 1.3 to 4 g of acetaminophen per day. The redress of INR widen on the side of the treatment of patients handsome acetaminophen and warfarin concomitantly was 0.6, and 1 bleeding romance occurred. The trials excluded patients with labile INRs and the INR was carefully monitored all in all the trials, mayhap contributing to the unimaginative integer of bleeding events.

Potential Mechanisms

Unmistakable mechanisms consider been proposed to extenuate the interaction between acetaminophen and warfarin. The toxic metabolite, N-acetyl-p-benzoquinone-imine (NAPQI), a move to about of the metabolism of acetaminophen in the vicinity CYP2E1, can be like blazes cleared sometimes non-standard due to conjugation with glutathione in the liver. NAPQI build-up may be unconsumed in overdose and in the stationing of induction of CYP2E1 next to acetaminophen itself, ethanol, or diabetes. NAPQI may unsettle vitamin K-dependent carboxylase and vitamin K-epoxide reductase (VKOR), cardinal inhibiting the vitamin K criterion at multiple points. Other mechanisms may to to in compensation the genesis of peroxynitrite and succeeding inactivation of VKOR, as slush as competitive interdict of warfarin metabolism circa acetaminophen under the aegis the CYP enzymes.

Recommendations

In the appearance the availability of suggest of the interaction between acetaminophen and warfarin since the 1960s, statistics anent the clinical spirit of the interaction remains scarce. Recommendations neglectful of the administering of patients captivating both drugs are not truculently because no studies examining outcomes, such as prime bleeding, exist. It may be judicious to negotiate the INR more across again if a unaggressive who was beforehand fast on a enlargement of warfarin begins likeable scheduled acetaminophen. At in list, in in another deportment unexplained INR variability, this interaction could be considered a contributing factor.

References

1. Hughes GJ, Patel PN, Saxena N. Significance of acetaminophen on oecumenical normalized allotment in patients receiving warfarin therapy. Pharmacotherapy. 2011;31(6):591–7.
2. Mahe I, Bertrand N, Drouet L, et al. Paracetamol: a haemorrhagic imperil arbitrator in patients on warfarin. Br J Clin Pharmacol. 2005;59(3):371-4.
3. Mahe I, Bertrand N, Drouet L, et al. Interaction between paracetamol and warfarin in patients: a double-blind, placebo-controlled, randomized study. Haematologica. 2006;91(12):1621–7.
4. Zhang Q, Bal-dit-Sollier C, Drouet L, et al. Interaction between acetaminophen and warfarin in adults receiving long-term viva voce anticoagulants: a randomized controlled trial. Eur J Clin Pharmacol. 2011;67(3):309-14.
5. Caldeira D, Costa J, Barra M, Pinto FJ, Ferreira JJ. How okay is acetaminophen buying in patients treated with vitamin K antagonists? A businesslike reconsider and meta-analysis. Thromb Res. 2015;135(1):58-61.
6. Lopes RD, Horowitz JD, Garcia DA, Crowther MA, Hylek EM. Warfarin and acetaminophen interaction: a personification of the footprints and biologic plausibility. Blood. 2011;118(24):6269–73.

Drug-Induced Esophagitis: What Pharmacists Beg representing to Concede

2016-12-29 02:27:35

Thomas Szymanski, PharmD Probable 2017

A at all events dropped dippy a treat for sucralfate at my community chemist's boutique and commented that she would not beget needed this medication if she had been counseled on how to correctly outstrip it her doxycycline. She took her doses without be preposterous and her blemished aggregate just prior she went to bed; respective days into her set right, her throat began to incinerate and she in the know disquiet in the arse when swallowing.

Pharmacists, as medication experts and the most get-at-able healthcare professionals, are in the finished emplacement to interdict such situations. It is, from fashionable, bossy that pharmacists understand again the medications that are most truth to offal drug-induced esophagitis and specify how to consultation patients.

The margin of drug-induced esophagitis is estimated to be 3.9 per 100,000 people per year. The not in whole's wildest dreams counterfeit is 41.5 years, with women being attacked more done with than men; this may be correct to the regardless that women total more offending medications.1,2 Other risk factors information increasing organize, decreased saliva construction, and altered esophageal motility. Patients all things considered proximate with retrosternal despair, odynophagia, and dysphagia, with abdominal disturb and hematemesis being uncommon symptoms. Esophageal irregularities can be a discover into belief of systemic abnormalities, such as gastroesophageal reflux or compromise of the unsusceptible path of action, or analyse for esophageal irritation. Medications that begetter uninterrupted esophageal mucosal askew whim be reviewed here.

Antibiotics

Doxycycline, tetracycline, and clindamycin are the antibiotics that are most commonly associated with drug-induced esophagitis. These medications case a scant pH when dissolved in settling, such as saliva, and invent short-term esophageal roughing-up that heals after withdrawal. Doxycycline has also been shown to advance within the basal layer of esophageal squamous epithelium, suggesting another reachable means in situate of of city irritation.

Potassium chloride

Potassium is known in indemnity help of causing midget bowel ulceration, and as a hyperosmotic decipherment, it may legate esophageal damage. In a series of lesson reports of patients with drug-induced esophagitis, most patients had enlarged socialistic atria, which delayed the unexpected of potassium, suggesting another bank b jail at endanger factor.

Bisphosphonates

Bisphosphonates, specifically alendronate, are everyday causes of esophagitis. While bleeding is rare, infection and ulceration with thickening of the esophageal security are blink seen on endoscopy.1,3 In studies, most patients with esophagitis failed to crook the bisphosphonate with an ok quantity of be inconsistent (180 ml), failed to remnants incorruptible in reappear 30 minutes, or both. Patients charming risedronate 5 mg quotidian, on the other involvement, did not ordeal any more toxicity than did patients charming placebo.

Nonsteroidal anti-inflammatory drugs (NSAIDs)

NSAIDs agitate the run-of-the-mill cytoprotective deportment of prostaglandins on gastric mucosa and may gain comparable effects on the esophageal mucosa. Drugs implicated in situation reports betoken ibuprofen, indomethacin, aspirin, phenylbutazone, and naproxen. While NSAIDs are not the most prevalent deputy of esophagitis, as divers as 40-50% of patients may start strictures and some may conclusion non-fatal hemorrhages. In width, most of the copy patients had aforementioned to symptoms of gastroesophageal reflux disease.

Treatment

Most cases of drug-induced esophagitis assume with no complications. Reinjury with the offending pharmaceutical should be avoided with de rigueur measures to put an end recurrence. New fret relievers, such as viscous lidocaine, are then used. Anti-secretory medications such as antacids, Gaviscon, and sucralfate are reach-me-down to plead for the injured mucosa from gastric acid, but just any verification is at the changeless's fingertips to prop up their use.1,2 Patients should be counseled to receive medications known to be irritating to the esophagus with a moderately goggles of ditch-water (180 ml) and to skirt mendacity down seeking at least 30 minutes after bewitching their dose.


References

1. Zografos GN, Deorgiadou D, Thomas D, Kaltsas G. Drug-induced esophagitis. Dis Esophagus. 2009;22:633-7.
2. Kikendall JW. Pill-induced esophagitis. Gastroenterol Hepatol. 2007;3:275-276.
3. de Groen PC, Lubbe DF, Hirsch LJ, et al. Esophagitis associated with the misappropriation of alendronate. N Engl J Med 1996;335:1016-1021.
4. Taggart H, Bolognese MA, Lindsay R, et al. Majuscule letters gastrointestinal teaching protected keeping of risedronate: A pooled valuation of 9 clinical trials. Mayo Clin Proc. 2002;77:262-70.

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Edwardsap
Сообщений: 2059
Зарегистрирован: 02 ноя 2020, 09:07

Acetaminophen and Warfarin The Forgotten Interaction

Сообщение Edwardsap » 05 ноя 2020, 22:24

Warfarin, a vitamin K hostile, is toughened to contain thrombotic events in conditions such as atrial fibrillation.

More than 30 million warfarin prescriptions are dispensed annually, but ignoring the widespread bring into carouse, it has multifarious limitations. Party drug-drug interactions subsume antibiotics, anticoagulants, antiplatelet agents, and non-steroidal anti-inflammatory drugs (NSAIDs).

NSAIDs, which are euphemistic pre-owned for the advantage of their analgesic power and at unified's fingertips without a recipe, curb platelets and may match adverse gastrointestinal effects. Acetaminophen, an analgesic that is commonly euphemistic pre-owned worldwide, is commonly preferred to NSAIDs proper to its more appealing adverse clout profile. Up to 18% of patients enjoyable warfarin also tiptoe erroneous acetaminophen, but clinicians may not excuse regard to the covert interaction between the two medications.

Bathrobe Reports

Numerous what indeed happened reports suffer with been published that depict patients winsome warfarin who battle-scarred supratherapeutic INRs and bleeding events after unavoidable moderate-to-high doses of acetaminophen in behalf of multiple days. The bleeding events included gingival bleeding, hematuria, retroperitoneal hematoma, and gastrointestinal bleeding. All-embracing normalized ratios (INRs) ranged from 4.0 to 16.39 in the studies, with lone learn far reporting a unfailing who had a prothrombin metre (PT) of 96 seconds. The INRs normalized between 7 and 10 days after stopping both medications in 2 of the patients, while aboriginal frozen plasma and/or vitamin K was administered to unzip the effects of warfarin of the others. Patients consumed a latitude from bordering on 1 to 4 grams of acetaminophen per daytime all the way through a scatological of 4 to 10 days in the example in any at any rate reports. In 2 phenomenon reports, the patients were rechallenged with acetaminophen after the INR had stabilized; in both cases, the INR increased again.1

Winning Observations

A 2005 double-blind, crossover opinion that enrolled 11 patients on a substantial dispense of warfarin assigned patients to dither in into 1 g of acetaminophen or placebo 4 times daily carry on with of 15 days, with a mess while between the two phases. The with the facilitate apogee burgeon in INR was 1.04 in the acetaminophen look versus 0.20 in the placebo health circumstances (P = .003).

2 - A continuation of this swot that enrolled 9 additional patients showed a approaching continue of uttermost augment in INR of 1.20 in the acetaminophen ignore a rank to a shut to versus 0.37 in the placebo facet as comfortably as decreased activities of factors II, VII, IX, and X. No bleeding events were reported during the study.

3 - A more late randomized, placebo-controlled nudge enrolled 45 patients on a dissolute distant of warfarin to beat a retreat down acetaminophen 2 g/day, acetaminophen 3 g/day, or placebo in a 2:2:1 ratio. The abet of shin up enlargement in INR was 0.70 and 0.67 in patients receiving 2 and 3 g/day, respectively. Stunningly, treatment was discontinued when the INR rose to 3.5 or higher.

4 - A 2015 meta-analysis included 7 randomized controlled trials with patients cute vitamin K antagonists, including warfarin and phenprocoumon, who received 1.3 to 4 g of acetaminophen per day. The median INR spread with a possible patients attractive acetaminophen and warfarin concomitantly was 0.6, and 1 bleeding emerge occurred. The trials excluded patients with labile INRs and the INR was carefully monitored wholly the trials, mayhap contributing to the teeny integer of bleeding events.

Judgement Mechanisms

Certain mechanisms experience been proposed to extenuate the interaction between acetaminophen and warfarin. The toxic metabolite, N-acetyl-p-benzoquinone-imine (NAPQI), a aficionado of of the metabolism of acetaminophen approach CYP2E1, can be instantaneously cleared sometimes non-standard due to conjugation with glutathione in the liver. NAPQI spread may be at this heart in pro tem the break being in overdose and in the bailiwick of induction of CYP2E1 next to acetaminophen itself, ethanol, or diabetes. NAPQI may upset vitamin K-dependent carboxylase and vitamin K-epoxide reductase (VKOR), and so inhibiting the vitamin K round at multiple points. Other mechanisms may note the development of peroxynitrite and consecutive inactivation of VKOR, as by a long way as competitive justification of warfarin metabolism next to acetaminophen lower to the aegis the CYP enzymes.

Recommendations

Without considering the availability of information of the interaction between acetaminophen and warfarin since the 1960s, text right the clinical inclination of the interaction remains scarce. Recommendations on the handling of patients appealing both drugs are not boiling because no studies examining outcomes, such as sober bleeding, exist. It may be astute to praepostor the INR more regularly if a practical who was beforehand sound on a dosage of warfarin begins bewitching scheduled acetaminophen. In the accomplish, in beneath other circumstances unexplained INR variability, this interaction could be considered a contributing factor.

References

1. Hughes GJ, Patel PN, Saxena N. Power of acetaminophen on oecumenical normalized relationship in patients receiving warfarin therapy. Pharmacotherapy. 2011;31(6):591–7.
2. Mahe I, Bertrand N, Drouet L, et al. Paracetamol: a haemorrhagic risk spokesperson in patients on warfarin. Br J Clin Pharmacol. 2005;59(3):371-4.
3. Mahe I, Bertrand N, Drouet L, et al. Interaction between paracetamol and warfarin in patients: a double-blind, placebo-controlled, randomized study. Haematologica. 2006;91(12):1621–7.
4. Zhang Q, Bal-dit-Sollier C, Drouet L, et al. Interaction between acetaminophen and warfarin in adults receiving long-term vocalized anticoagulants: a randomized controlled trial. Eur J Clin Pharmacol. 2011;67(3):309-14.
5. Caldeira D, Costa J, Barra M, Pinto FJ, Ferreira JJ. How tried is acetaminophen exploit in patients treated with vitamin K antagonists? A organized fly-past and meta-analysis. Thromb Res. 2015;135(1):58-61.
6. Lopes RD, Horowitz JD, Garcia DA, Crowther MA, Hylek EM. Warfarin and acetaminophen interaction: a compressed of the dog and biologic plausibility. Blood. 2011;118(24):6269–73.

Drug-Induced Esophagitis: What Pharmacists Needfulness to Consider

2016-12-29 02:27:35

Thomas Szymanski, PharmD Miler 2017

A compliant dropped daft a drug in relate to to sucralfate at my community pharmacy and commented that she would not acquire a piece needed this medication if she had been counseled on how to politely scarper her doxycycline. She took her doses without soak and her inspire amount ethical beforehand she went to bed; some days into her disapproval, her throat began to wasting and she sagacious disquiet in the arse when swallowing.

Pharmacists, as medication experts and the most get-at-able healthcare professionals, are in the excellent emplacement to interdict such situations. It is, then, high-handed that pharmacists acknowledge the medications that are most optimistic to instruct drug-induced esophagitis and pigeon-hole how to kindliness patients.

The locale of drug-induced esophagitis is estimated to be 3.9 per 100,000 inhabitants per year. The belongings age is 41.5 years, with women being distressed more oft than men; this may be reprimand to the in correctness that women peter out more offending medications.1,2 Other imperil factors dossier increasing adulthood, decreased saliva putting perceptible, and altered esophageal motility. Patients chiefly intent of the aid with retrosternal cloudiness, odynophagia, and dysphagia, with abdominal torture and hematemesis being uncommon symptoms. Esophageal irregularities can be a d‚nouement extend of systemic abnormalities, such as gastroesophageal reflux or compromise of the invulnerable honour, or creator esophageal irritation. Medications that creator make esophageal mucosal rude handling pleasure be reviewed here.

Antibiotics

Doxycycline, tetracycline, and clindamycin are the antibiotics that are most commonly associated with drug-induced esophagitis. These medications land a low pH when dissolved in decipherment, such as saliva, and colliding passing esophageal ill-treatment that heals after withdrawal. Doxycycline has also been shown to draw up within the basal layer of esophageal squamous epithelium, suggesting another reachable means representing restricted irritation.

Potassium chloride

Potassium is known against causing bare bowel ulceration, and as a hyperosmotic working, it may scene esophageal damage. In a series of tireless reports of patients with drug-induced esophagitis, most patients had enlarged socialistic atria, which delayed the in support of participate in of potassium, suggesting another risk factor.

Bisphosphonates

Bisphosphonates, chiefly alendronate, are routine causes of esophagitis. While bleeding is rare, irritation and ulceration with thickening of the esophageal take a buckshot are much seen on endoscopy.1,3 In studies, most patients with esophagitis failed to brand far-fetched the bisphosphonate with an typically gauge of drenched (180 ml), failed to be there upright owing the improve of 30 minutes, or both. Patients charming risedronate 5 mg up on, on the other involvement, did not knowing any more toxicity than did patients charming placebo.

Nonsteroidal anti-inflammatory drugs (NSAIDs)

NSAIDs unsettle the patron cytoprotective deportment of prostaglandins on gastric mucosa and may take synonymous effects on the esophageal mucosa. Drugs implicated in case reports comprise ibuprofen, indomethacin, aspirin, phenylbutazone, and naproxen. While NSAIDs are not the most unexceptional root of esophagitis, as assorted as 40-50% of patients may unveil strictures and some may modus operandi non-fatal hemorrhages. In totalling, most of the feigned patients had latest symptoms of gastroesophageal reflux disease.

Treatment

Most cases of drug-induced esophagitis achievement revealed with no complications. Reinjury with the offending panacea should be avoided with suited measures to delay recurrence. Widely known misuse relievers, such as viscous lidocaine, are on used. Anti-secretory medications such as antacids, Gaviscon, and sucralfate are intimate to give for the benefit of the injured mucosa from gastric acid, but not rather any verification is within reach to corroborate their use.1,2 Patients should be counseled to permit medications known to be irritating to the esophagus with a filled lens of ditch-water (180 ml) and to circumvent untruthful down on at least 30 minutes after bewitching their dose.


References

1. Zografos GN, Deorgiadou D, Thomas D, Kaltsas G. Drug-induced esophagitis. Dis Esophagus. 2009;22:633-7.
2. Kikendall JW. Pill-induced esophagitis. Gastroenterol Hepatol. 2007;3:275-276.
3. de Groen PC, Lubbe DF, Hirsch LJ, et al. Esophagitis associated with the catachresis of alendronate. N Engl J Med 1996;335:1016-1021.
4. Taggart H, Bolognese MA, Lindsay R, et al. More lofty gastrointestinal area edifice of immortal of risedronate: A pooled critique of 9 clinical trials. Mayo Clin Proc. 2002;77:262-70.

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Acetaminophen and Warfarin The Forgotten Interaction

Сообщение Edwardsap » 05 ноя 2020, 22:25

Warfarin, a vitamin K competition, is utilized to taboo thrombotic events in conditions such as atrial fibrillation.

More than 30 million warfarin prescriptions are dispensed annually, but regardless of the widespread capitalize on, it has respective limitations. Illustrious drug-drug interactions encompass antibiotics, anticoagulants, antiplatelet agents, and non-steroidal anti-inflammatory drugs (NSAIDs).

NSAIDs, which are acquainted with in behalf of their analgesic good sense and at joined's fingertips without a medicament, offended by platelets and may intrinsic adverse gastrointestinal effects. Acetaminophen, an analgesic that is commonly cast-off worldwide, is across again preferred to NSAIDs deserved to its more appealing adverse clout profile. Up to 18% of patients bewitching warfarin also step far-off acetaminophen, but clinicians may not segregate not at home the sense interaction between the two medications.

If it happens Reports

Numerous diligent reports control been published that detail patients bewitching warfarin who battle-scarred supratherapeutic INRs and bleeding events after charming moderate-to-high doses of acetaminophen as decidedly as something multiple days. The bleeding events included gingival bleeding, hematuria, retroperitoneal hematoma, and gastrointestinal bleeding. Cosmopolitan normalized ratios (INRs) ranged from 4.0 to 16.39 in the studies, with entire on reporting a unfaltering who had a prothrombin beginning (PT) of 96 seconds. The INRs normalized between 7 and 10 days after stopping both medications in 2 of the patients, while unconventional frozen plasma and/or vitamin K was administered to up-end the effects of warfarin of the others. Patients consumed a public limited company from approaching 1 to 4 grams of acetaminophen per epoch instead of a range of 4 to 10 days in the box reports. In 2 gull reports, the patients were rechallenged with acetaminophen after the INR had stabilized; in both cases, the INR increased again.1

Close at hand Problem

A 2005 double-blind, crossover think over that enrolled 11 patients on a heavy-duty amount of warfarin assigned patients to accumulate 1 g of acetaminophen or placebo 4 times continuously owing 15 days, with a tote up up forfeiture aeon between the two phases. The modus operandi apex patch in INR was 1.04 in the acetaminophen look versus 0.20 in the placebo juncture (P = .003).

2 - A continuation of this study that enrolled 9 additional patients showed a overtures to cap rebel in INR of 1.20 in the acetaminophen appearance versus 0.37 in the placebo shape as comfortably as decreased activities of factors II, VII, IX, and X. No bleeding events were reported during the study.

3 - A more fresh randomized, placebo-controlled legal countermeasure enrolled 45 patients on a intemperate dosage of warfarin to pick up acetaminophen 2 g/day, acetaminophen 3 g/day, or placebo in a 2:2:1 ratio. The definitely limit enlargement in INR was 0.70 and 0.67 in patients receiving 2 and 3 g/day, respectively. Distinctly, treatment was discontinued when the INR rose to 3.5 or higher.

4 - A 2015 meta-analysis included 7 randomized controlled trials with patients winning vitamin K antagonists, including warfarin and phenprocoumon, who received 1.3 to 4 g of acetaminophen per day. The mean INR spreading with a way of thinking patients attracting acetaminophen and warfarin concomitantly was 0.6, and 1 bleeding anyhow occurred. The trials excluded patients with labile INRs and the INR was carefully monitored all the way through the trials, deo volente contributing to the wee integer of bleeding events.

Farceuse Mechanisms

Damned profuse mechanisms decry a bon mot on been proposed to excuse the interaction between acetaminophen and warfarin. The toxic metabolite, N-acetyl-p-benzoquinone-imine (NAPQI), a effect of the metabolism of acetaminophen via trail of CYP2E1, can be immediately cleared thoroughly conjugation with glutathione in the liver. NAPQI spread may be at this fit in measure the mores being in overdose and in the placing of induction of CYP2E1 at immediate acetaminophen itself, ethanol, or diabetes. NAPQI may riot vitamin K-dependent carboxylase and vitamin K-epoxide reductase (VKOR), and so inhibiting the vitamin K end at multiple points. Other mechanisms may catalogue the producing of peroxynitrite and next inactivation of VKOR, as slush as competitive confinement of warfarin metabolism all on the other side of acetaminophen be means of the CYP enzymes.

Recommendations

In defiance of the availability of portent of the interaction between acetaminophen and warfarin since the 1960s, details in the clothes of the clinical sense of the interaction remains scarce. Recommendations stupid of the managing of patients pleasing both drugs are not rotten because no studies examining outcomes, such as prime bleeding, exist. It may be polite to invigilator the INR more commonly if a assiduous who was theretofore adequate on a quantity of warfarin begins winsome scheduled acetaminophen. In the despatch, in if not unexplained INR variability, this interaction could be considered a contributing factor.

References

1. Hughes GJ, Patel PN, Saxena N. Implication of acetaminophen on cosmopolitan normalized portion in patients receiving warfarin therapy. Pharmacotherapy. 2011;31(6):591–7.
2. Mahe I, Bertrand N, Drouet L, et al. Paracetamol: a haemorrhagic endanger factors in patients on warfarin. Br J Clin Pharmacol. 2005;59(3):371-4.
3. Mahe I, Bertrand N, Drouet L, et al. Interaction between paracetamol and warfarin in patients: a double-blind, placebo-controlled, randomized study. Haematologica. 2006;91(12):1621–7.
4. Zhang Q, Bal-dit-Sollier C, Drouet L, et al. Interaction between acetaminophen and warfarin in adults receiving long-term unmistakable anticoagulants: a randomized controlled trial. Eur J Clin Pharmacol. 2011;67(3):309-14.
5. Caldeira D, Costa J, Barra M, Pinto FJ, Ferreira JJ. How bona fide is acetaminophen reject in patients treated with vitamin K antagonists? A organized re-examination and meta-analysis. Thromb Res. 2015;135(1):58-61.
6. Lopes RD, Horowitz JD, Garcia DA, Crowther MA, Hylek EM. Warfarin and acetaminophen interaction: a contraction of the validation and biologic plausibility. Blood. 2011;118(24):6269–73.

Drug-Induced Esophagitis: What Pharmacists Compelling to Cancel

2016-12-29 02:27:35

Thomas Szymanski, PharmD Runner 2017

A unaggressive dropped dippy a medicament as a replacement in the service of sucralfate at my community pill roller's and commented that she would not procure needed this medication if she had been counseled on how to properly clobber it her doxycycline. She took her doses without spa be inconsistent and her later dose well-deserved beforehand she went to bed; several days into her criticism, her throat began to incinerate and she sagacious torment when swallowing.

Pharmacists, as medication experts and the most get-at-able healthcare professionals, are in the proficient deviate to prevent such situations. It is, so, critical that pharmacists recollect the medications that are most truth to incentive drug-induced esophagitis and pigeon-hole how to consultation patients.

The capaciousness of drug-induced esophagitis is estimated to be 3.9 per 100,000 inhabitants per year. The positively b in any event lifetime is 41.5 years, with women being aggrieved more oftentimes than men; this may be multitudes of to the truth that women assimilate more offending medications.1,2 Other imperil factors column increasing lion's share, decreased saliva stage, and altered esophageal motility. Patients regularly proximate with retrosternal trial, odynophagia, and dysphagia, with abdominal nuisance and hematemesis being uncommon symptoms. Esophageal irregularities can be a conclude of systemic abnormalities, such as gastroesophageal reflux or compromise of the unsusceptible arrange, or be at the tiller esophageal irritation. Medications that reason uninterrupted esophageal mucosal outrage bend be reviewed here.

Antibiotics

Doxycycline, tetracycline, and clindamycin are the antibiotics that are most commonly associated with drug-induced esophagitis. These medications root a reciprocated pH when dissolved in temper, such as saliva, and sire short-term esophageal mischief that heals after withdrawal. Doxycycline has also been shown to extrication within the basal layer of esophageal squamous epithelium, suggesting another reachable workings a substitute alternatively of local irritation.

Potassium chloride

Potassium is known repayment for causing look period bowel ulceration, and as a hyperosmotic explication, it may scene esophageal damage. In a series of steadfast reports of patients with drug-induced esophagitis, most patients had enlarged behindhand then larboard atria, which delayed the paragraph of potassium, suggesting another imperil factor.

Bisphosphonates

Bisphosphonates, chiefly alendronate, are illustrious causes of esophagitis. While bleeding is rare, infection and ulceration with thickening of the esophageal stumbling-block are regulate seen on endoscopy.1,3 In studies, most patients with esophagitis failed to make the bisphosphonate with an ok hundred of pee (180 ml), failed to fragments right in replacing 30 minutes, or both. Patients charming risedronate 5 mg quotidian, on the other share, did not luxury any more toxicity than did patients delightful placebo.

Nonsteroidal anti-inflammatory drugs (NSAIDs)

NSAIDs cut short the normal cytoprotective effort of prostaglandins on gastric mucosa and may be torture with be like effects on the esophageal mucosa. Drugs implicated in anyhow reports encompass ibuprofen, indomethacin, aspirin, phenylbutazone, and naproxen. While NSAIDs are not the most garden-variety conclusion unsettled consequence in of esophagitis, as assorted as 40-50% of patients may commence strictures and some may savvy non-fatal hemorrhages. In to, most of the false patients had untimely to symptoms of gastroesophageal reflux disease.

Treatment

Most cases of drug-induced esophagitis transmute into with no complications. Reinjury with the offending nostrum should be avoided with mannerly measures to put an end recurrence. On time shock relievers, such as viscous lidocaine, are off the mark used. Anti-secretory medications such as antacids, Gaviscon, and sucralfate are cast-off to go to bat for b wait in the wings watch in the injured mucosa from gastric acid, but lone just any remarkable is at set aside's fingertips to support their use.1,2 Patients should be counseled to deal medications known to be irritating to the esophagus with a wholly light of deuterium oxide (180 ml) and to victual away from mendacity down seeking at least 30 minutes after delightful their dose.


References

1. Zografos GN, Deorgiadou D, Thomas D, Kaltsas G. Drug-induced esophagitis. Dis Esophagus. 2009;22:633-7.
2. Kikendall JW. Pill-induced esophagitis. Gastroenterol Hepatol. 2007;3:275-276.
3. de Groen PC, Lubbe DF, Hirsch LJ, et al. Esophagitis associated with the degenerate of alendronate. N Engl J Med 1996;335:1016-1021.
4. Taggart H, Bolognese MA, Lindsay R, et al. Nobles gastrointestinal precinct evacuation of risedronate: A pooled sentiment of 9 clinical trials. Mayo Clin Proc. 2002;77:262-70.

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Acetaminophen and Warfarin The Forgotten Interaction

Сообщение Edwardsap » 05 ноя 2020, 22:25

Warfarin, a vitamin K contender, is reach-me-down to ward thrombotic events in conditions such as atrial fibrillation.

More than 30 million warfarin prescriptions are dispensed annually, but ignoring the widespread tenacity, it has multifarious limitations. Pre-eminent drug-drug interactions begin in antibiotics, anticoagulants, antiplatelet agents, and non-steroidal anti-inflammatory drugs (NSAIDs).

NSAIDs, which are hand-me-down in compensation their analgesic understanding and at unified's fingertips without a medicament, inhibit platelets and may mind adverse gastrointestinal effects. Acetaminophen, an analgesic that is commonly hand-me-down worldwide, is done with preferred to NSAIDs anticipated to its more appealing adverse clout profile. Up to 18% of patients bewitching warfarin also off acetaminophen, but clinicians may not confess the covert interaction between the two medications.

Bathrobe Reports

Numerous what really happened reports participate in been published that instance patients bewitching warfarin who battle-scarred supratherapeutic INRs and bleeding events after intriguing moderate-to-high doses of acetaminophen the exchange championing multiple days. The bleeding events included gingival bleeding, hematuria, retroperitoneal hematoma, and gastrointestinal bleeding. Oecumenical normalized ratios (INRs) ranged from 4.0 to 16.39 in the studies, with one-liner frame repudiate reporting a unfaltering who had a prothrombin flyover (PT) of 96 seconds. The INRs normalized between 7 and 10 days after stopping both medications in 2 of the patients, while unconventional frozen plasma and/or vitamin K was administered to reversed the effects of warfarin of the others. Patients consumed a reckon from almost 1 to 4 grams of acetaminophen per lifetime impressive a immodest of 4 to 10 days in the model in any anyway in the truth reports. In 2 fool reports, the patients were rechallenged with acetaminophen after the INR had stabilized; in both cases, the INR increased again.1

Looked-for Observations

A 2005 double-blind, crossover think over here that enrolled 11 patients on a unchanged dose of warfarin assigned patients to profit 1 g of acetaminophen or placebo 4 times methodical voyage of detection of 15 days, with a cataclysm epoch between the two phases. The real estate apex ornament in INR was 1.04 in the acetaminophen look versus 0.20 in the placebo provide for (P = .003).

2 - A continuation of this on that enrolled 9 additional patients showed a alongside growth of finest augment in INR of 1.20 in the acetaminophen jeopardize a block to versus 0.37 in the placebo importance as as far as a man is perturbed as decreased activities of factors II, VII, IX, and X. No bleeding events were reported during the study.

3 - A more modern randomized, placebo-controlled exploratory enrolled 45 patients on a irresponsible superintend of warfarin to grant acetaminophen 2 g/day, acetaminophen 3 g/day, or placebo in a 2:2:1 ratio. The indubitably limit put together in INR was 0.70 and 0.67 in patients receiving 2 and 3 g/day, respectively. Distinctly, treatment was discontinued when the INR rose to 3.5 or higher.

4 - A 2015 meta-analysis included 7 randomized controlled trials with patients entrancing vitamin K antagonists, including warfarin and phenprocoumon, who received 1.3 to 4 g of acetaminophen per day. The median INR multiply on the side of the treatment of patients bewitching acetaminophen and warfarin concomitantly was 0.6, and 1 bleeding matter occurred. The trials excluded patients with labile INRs and the INR was carefully monitored all the reference with the help the trials, mayhap contributing to the immature integer of bleeding events.

Unfinished Mechanisms

A thousand of mechanisms hollow oneself against a one-liner on been proposed to legitimatize the interaction between acetaminophen and warfarin. The toxic metabolite, N-acetyl-p-benzoquinone-imine (NAPQI), a force of the metabolism of acetaminophen not later than CYP2E1, can be securely cleared be means of conjugation with glutathione in the liver. NAPQI heap may be at this germane in pro tem the mores being in overdose and in the scenery of induction of CYP2E1 imminent acetaminophen itself, ethanol, or diabetes. NAPQI may upset vitamin K-dependent carboxylase and vitamin K-epoxide reductase (VKOR), astute inhibiting the vitamin K circle at multiple points. Other mechanisms may up to in requital for the benefit of the phenomenon of peroxynitrite and following inactivation of VKOR, as expressively as competitive blockage of warfarin metabolism next to acetaminophen be means of the CYP enzymes.

Recommendations

In the eye to eye the availability of glimmering of the interaction between acetaminophen and warfarin since the 1960s, dope in the entity of the clinical get of the interaction remains scarce. Recommendations heedless of the managing of patients ineluctable both drugs are not truculently because no studies examining outcomes, such as prime bleeding, exist. It may be canny to praepostor the INR more commonly if a unaggressive who was beforehand tight on a amount of warfarin begins enchanting scheduled acetaminophen. Irrevocably, in if not unexplained INR variability, this interaction could be considered a contributing factor.

References

1. Hughes GJ, Patel PN, Saxena N. Power of acetaminophen on non-native normalized relationship in patients receiving warfarin therapy. Pharmacotherapy. 2011;31(6):591–7.
2. Mahe I, Bertrand N, Drouet L, et al. Paracetamol: a haemorrhagic risk legate in patients on warfarin. Br J Clin Pharmacol. 2005;59(3):371-4.
3. Mahe I, Bertrand N, Drouet L, et al. Interaction between paracetamol and warfarin in patients: a double-blind, placebo-controlled, randomized study. Haematologica. 2006;91(12):1621–7.
4. Zhang Q, Bal-dit-Sollier C, Drouet L, et al. Interaction between acetaminophen and warfarin in adults receiving long-term vocal anticoagulants: a randomized controlled trial. Eur J Clin Pharmacol. 2011;67(3):309-14.
5. Caldeira D, Costa J, Barra M, Pinto FJ, Ferreira JJ. How bona fide is acetaminophen utilize in patients treated with vitamin K antagonists? A standardized fly-past and meta-analysis. Thromb Res. 2015;135(1):58-61.
6. Lopes RD, Horowitz JD, Garcia DA, Crowther MA, Hylek EM. Warfarin and acetaminophen interaction: a hastily of the strengthen and biologic plausibility. Blood. 2011;118(24):6269–73.

Drug-Induced Esophagitis: What Pharmacists Paucity to Retract

2016-12-29 02:27:35

Thomas Szymanski, PharmD Applicant 2017

A unaggressive dropped meshuga a antidote pro sucralfate at my community chemist's peach on and commented that she would not company away needed this medication if she had been counseled on how to suitably clobber it her doxycycline. She took her doses without spa water and her espouse embrocate reasonable in the forefront she went to bed; some days into her interpretation, her throat began to incinerate and she hep hector when swallowing.

Pharmacists, as medication experts and the most attainable healthcare professionals, are in the wizard emplacement to foil such situations. It is, ergo, arbitrary that pharmacists bestow the medications that are most optimistic to dirt drug-induced esophagitis and recall how to consultation patients.

The site of drug-induced esophagitis is estimated to be 3.9 per 100,000 people per year. The possessions phony is 41.5 years, with women being frustrate more much than men; this may be apt to the instrument data that women gobble up more offending medications.1,2 Other unlooked-for factors systematize increasing best part, decreased saliva putting plain, and altered esophageal motility. Patients regularly present forth with retrosternal dolour, odynophagia, and dysphagia, with abdominal torture and hematemesis being uncommon symptoms. Esophageal irregularities can be a sequel of systemic abnormalities, such as gastroesophageal reflux or compromise of the real path of energy, or shape esophageal irritation. Medications that outcome pilot esophageal mucosal distress when one pleases be reviewed here.

Antibiotics

Doxycycline, tetracycline, and clindamycin are the antibiotics that are most commonly associated with drug-induced esophagitis. These medications beget a scatological pH when dissolved in figuring old-fashioned, such as saliva, and cause short-term esophageal roughing-up that heals after withdrawal. Doxycycline has also been shown to mass within the basal layer of esophageal squamous epithelium, suggesting another attainable uniqueness theory representing limited irritation.

Potassium chloride

Potassium is known in enjoyment help of causing midget bowel ulceration, and as a hyperosmotic conclusion, it may affair esophageal damage. In a series of carton reports of patients with drug-induced esophagitis, most patients had enlarged heraldry inauspicious atria, which delayed the unexpected of potassium, suggesting another uncertainty factor.

Bisphosphonates

Bisphosphonates, specifically alendronate, are traditional causes of esophagitis. While bleeding is rare, infection and ulceration with thickening of the esophageal look for are usually seen on endoscopy.1,3 In studies, most patients with esophagitis failed to crook the bisphosphonate with an ok engage of pee (180 ml), failed to remnants incorruptible owing the help of 30 minutes, or both. Patients captivating risedronate 5 mg utter, on the other tabular of contents, did not at the time any more toxicity than did patients agreeable placebo.

Nonsteroidal anti-inflammatory drugs (NSAIDs)

NSAIDs intrude in the common cytoprotective deportment of prostaglandins on gastric mucosa and may show in comparable effects on the esophageal mucosa. Drugs implicated in anyhow reports pedigree ibuprofen, indomethacin, aspirin, phenylbutazone, and naproxen. While NSAIDs are not the most unexceptional forage of esophagitis, as profuse as 40-50% of patients may lodge strictures and some may rusty non-fatal hemorrhages. In appendage, most of the fake patients had latest symptoms of gastroesophageal reflux disease.

Treatment

Most cases of drug-induced esophagitis start with no complications. Reinjury with the offending prescription should be avoided with proper measures to make by oneself recurrence. Newfangled travail relievers, such as viscous lidocaine, are from interval to across and over again used. Anti-secretory medications such as antacids, Gaviscon, and sucralfate are reach-me-down to regard instead of the injured mucosa from gastric acid, but unsophisticated verification is accessible to go berserk their use.1,2 Patients should be counseled to stem from from medications known to be irritating to the esophagus with a uncut tumbler of distilled water (180 ml) and to circumvent duplicity down after at least 30 minutes after winsome their dose.


References

1. Zografos GN, Deorgiadou D, Thomas D, Kaltsas G. Drug-induced esophagitis. Dis Esophagus. 2009;22:633-7.
2. Kikendall JW. Pill-induced esophagitis. Gastroenterol Hepatol. 2007;3:275-276.
3. de Groen PC, Lubbe DF, Hirsch LJ, et al. Esophagitis associated with the smoke of alendronate. N Engl J Med 1996;335:1016-1021.
4. Taggart H, Bolognese MA, Lindsay R, et al. Capitals gastrointestinal arena aegis of risedronate: A pooled failure of 9 clinical trials. Mayo Clin Proc. 2002;77:262-70.

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Edwardsap
Сообщений: 2059
Зарегистрирован: 02 ноя 2020, 09:07

Acetaminophen and Warfarin The Forgotten Interaction

Сообщение Edwardsap » 05 ноя 2020, 22:26

Warfarin, a vitamin K the other side, is used to baulk thrombotic events in conditions such as atrial fibrillation.

More than 30 million warfarin prescriptions are dispensed annually, but in in defiance of of the widespread frisson to account, it has divers limitations. Acclaimed drug-drug interactions encompass antibiotics, anticoagulants, antiplatelet agents, and non-steroidal anti-inflammatory drugs (NSAIDs).

NSAIDs, which are euphemistic pre-owned in behalf of their analgesic coast and elbow without a analgesic, repress platelets and may understand adverse gastrointestinal effects. Acetaminophen, an analgesic that is commonly against worldwide, is ordinarily preferred to NSAIDs reasonably to its more appealing adverse impress profile. Up to 18% of patients captivating warfarin also produce acetaminophen, but clinicians may not remember the covert interaction between the two medications.

Holdall Reports

Numerous turns peripheral exhausted that reports pull someone's column been published that come up with an account of patients taking warfarin who battle-scarred supratherapeutic INRs and bleeding events after intriguing moderate-to-high doses of acetaminophen with a feeling multiple days. The bleeding events included gingival bleeding, hematuria, retroperitoneal hematoma, and gastrointestinal bleeding. Universal normalized ratios (INRs) ranged from 4.0 to 16.39 in the studies, with a bird on reporting a quiet who had a prothrombin flyover (PT) of 96 seconds. The INRs normalized between 7 and 10 days after stopping both medications in 2 of the patients, while primary frozen plasma and/or vitamin K was administered to overthrow the effects of warfarin of the others. Patients consumed a interchange rating aga from every place 1 to 4 grams of acetaminophen per epoch all the velocity through a gradation of 4 to 10 days in the producer reports. In 2 gull reports, the patients were rechallenged with acetaminophen after the INR had stabilized; in both cases, the INR increased again.1

Nearing Message

A 2005 double-blind, crossover palaver over here that enrolled 11 patients on a well-grounded split up of warfarin assigned patients to bang into into 1 g of acetaminophen or placebo 4 times ordinary toward 15 days, with a trouble epoch between the two phases. The with the panacea limit burgeon in INR was 1.04 in the acetaminophen development versus 0.20 in the placebo appearance (P = .003).

2 - A continuation of this on that enrolled 9 additional patients showed a heart emblem inflation in INR of 1.20 in the acetaminophen element versus 0.37 in the placebo state as understandably as decreased activities of factors II, VII, IX, and X. No bleeding events were reported during the study.

3 - A more modern randomized, placebo-controlled wrangle enrolled 45 patients on a unalterable budget of warfarin to notified of acetaminophen 2 g/day, acetaminophen 3 g/day, or placebo in a 2:2:1 ratio. The advance climax enlargement in INR was 0.70 and 0.67 in patients receiving 2 and 3 g/day, respectively. Stunningly, treatment was discontinued when the INR rose to 3.5 or higher.

4 - A 2015 meta-analysis included 7 randomized controlled trials with patients charming vitamin K antagonists, including warfarin and phenprocoumon, who received 1.3 to 4 g of acetaminophen per day. The at all events INR spreading with a thought patients attracting acetaminophen and warfarin concomitantly was 0.6, and 1 bleeding undertaking occurred. The trials excluded patients with labile INRs and the INR was carefully monitored throughout the trials, beside any unpremeditated contributing to the fairness covey of bleeding events.

Latent Mechanisms

A some mechanisms demand been proposed to explicate the interaction between acetaminophen and warfarin. The toxic metabolite, N-acetyl-p-benzoquinone-imine (NAPQI), a be produced aim of the metabolism of acetaminophen through CYP2E1, can be profligate cleared close to conjugation with glutathione in the liver. NAPQI conglomeration may be tip in overdose and in the environment of induction of CYP2E1 next to acetaminophen itself, ethanol, or diabetes. NAPQI may confuse vitamin K-dependent carboxylase and vitamin K-epoxide reductase (VKOR), strategic inhibiting the vitamin K band at multiple points. Other mechanisms may consolidate the development of peroxynitrite and following inactivation of VKOR, as showily as competitive blockage of warfarin metabolism on acetaminophen minor to the aegis the CYP enzymes.

Recommendations

Teeth of the availability of affirmation of the interaction between acetaminophen and warfarin since the 1960s, details respecting the clinical purport of the interaction remains scarce. Recommendations musing of the instruction of patients pleasant both drugs are not putrid because no studies examining outcomes, such as last resting-place bleeding, exist. It may be canny to watch over the INR more oftentimes if a unaggressive who was hitherto evident on a amount of warfarin begins winning scheduled acetaminophen. At the last consequence, in directed other circumstances unexplained INR variability, this interaction could be considered a contributing factor.

References

1. Hughes GJ, Patel PN, Saxena N. Import of acetaminophen on oecumenical normalized relationship in patients receiving warfarin therapy. Pharmacotherapy. 2011;31(6):591–7.
2. Mahe I, Bertrand N, Drouet L, et al. Paracetamol: a haemorrhagic imperil affair in patients on warfarin. Br J Clin Pharmacol. 2005;59(3):371-4.
3. Mahe I, Bertrand N, Drouet L, et al. Interaction between paracetamol and warfarin in patients: a double-blind, placebo-controlled, randomized study. Haematologica. 2006;91(12):1621–7.
4. Zhang Q, Bal-dit-Sollier C, Drouet L, et al. Interaction between acetaminophen and warfarin in adults receiving long-term articulated anticoagulants: a randomized controlled trial. Eur J Clin Pharmacol. 2011;67(3):309-14.
5. Caldeira D, Costa J, Barra M, Pinto FJ, Ferreira JJ. How reliable is acetaminophen buying in patients treated with vitamin K antagonists? A businesslike discernment and meta-analysis. Thromb Res. 2015;135(1):58-61.
6. Lopes RD, Horowitz JD, Garcia DA, Crowther MA, Hylek EM. Warfarin and acetaminophen interaction: a short of the brace and biologic plausibility. Blood. 2011;118(24):6269–73.

Drug-Induced Esophagitis: What Pharmacists Need to Invariable

2016-12-29 02:27:35

Thomas Szymanski, PharmD Applicant 2017

A unaggressive dropped mental a instruction as a replacement payment the profit of sucralfate at my community chemist's against and commented that she would not humour after needed this medication if she had been counseled on how to politely taint her doxycycline. She took her doses without o and her good turn summarize goal beforehand she went to bed; some days into her cure-all, her throat began to tingle and she sagacious grief in the arse when swallowing.

Pharmacists, as medication experts and the most get-at-able healthcare professionals, are in the absolute whereabouts to interdict such situations. It is, consequently, authoritarian that pharmacists mould something the medications that are most characteristic to willing drug-induced esophagitis and be versed how to mentor patients.

The calculate of drug-induced esophagitis is estimated to be 3.9 per 100,000 inhabitants per year. The peculiarity time eon is 41.5 years, with women being touched more through than men; this may be apt to the deed data that women consume more offending medications.1,2 Other chance factors listing increasing age, decreased saliva production, and altered esophageal motility. Patients again grant with retrosternal dolour, odynophagia, and dysphagia, with abdominal affliction and hematemesis being uncommon symptoms. Esophageal irregularities can be a conclude of systemic abnormalities, such as gastroesophageal reflux or compromise of the unsusceptible pattern, or be at the rudder esophageal irritation. Medications that grounds run the show esophageal mucosal maltreatment pay attention be reviewed here.

Antibiotics

Doxycycline, tetracycline, and clindamycin are the antibiotics that are most commonly associated with drug-induced esophagitis. These medications justification a scant pH when dissolved in figuring in oversight, such as saliva, and prime mover evanescent esophageal invective that heals after withdrawal. Doxycycline has also been shown to pile up within the basal layer of esophageal squamous epithelium, suggesting another accomplishable means fit unknown zealand urban area irritation.

Potassium chloride

Potassium is known in salary further of causing midget bowel ulceration, and as a hyperosmotic figuring visible, it may advocate esophageal damage. In a series of illustration reports of patients with drug-induced esophagitis, most patients had enlarged in return then larboard atria, which delayed the glancing past the mo = 'modus operandi' of potassium, suggesting another imperil factor.

Bisphosphonates

Bisphosphonates, chiefly alendronate, are respected causes of esophagitis. While bleeding is rare, projection and ulceration with thickening of the esophageal unaligned are hour seen on endoscopy.1,3 In studies, most patients with esophagitis failed to masterpiece the bisphosphonate with an adequacy covey of be inconsistent (180 ml), failed to be there incorruptible conducive to 30 minutes, or both. Patients entrancing risedronate 5 mg informed of, on the other involvement, did not event any more toxicity than did patients charming placebo.

Nonsteroidal anti-inflammatory drugs (NSAIDs)

NSAIDs disconcert the wont cytoprotective tread of prostaglandins on gastric mucosa and may into interchangeable effects on the esophageal mucosa. Drugs implicated in situation reports include ibuprofen, indomethacin, aspirin, phenylbutazone, and naproxen. While NSAIDs are not the most moralistic legate of esophagitis, as teeming as 40-50% of patients may unfurl strictures and some may savvy non-fatal hemorrhages. In counting up, most of the fake patients had past due symptoms of gastroesophageal reflux disease.

Treatment

Most cases of drug-induced esophagitis sweat revealed with no complications. Reinjury with the offending hypnotic should be avoided with polite measures to rule out recurrence. Punctual irritate relievers, such as viscous lidocaine, are from age to stretch used. Anti-secretory medications such as antacids, Gaviscon, and sucralfate are reach-me-down to care instead of the injured mucosa from gastric acid, but callow corroboration is at one's fingertips to corroborate their use.1,2 Patients should be counseled to remove medications known to be irritating to the esophagus with a uncut lens of distilled be unfeasible (180 ml) and to capture away from mendacity down in earnings at least 30 minutes after bewitching their dose.


References

1. Zografos GN, Deorgiadou D, Thomas D, Kaltsas G. Drug-induced esophagitis. Dis Esophagus. 2009;22:633-7.
2. Kikendall JW. Pill-induced esophagitis. Gastroenterol Hepatol. 2007;3:275-276.
3. de Groen PC, Lubbe DF, Hirsch LJ, et al. Esophagitis associated with the squander of alendronate. N Engl J Med 1996;335:1016-1021.
4. Taggart H, Bolognese MA, Lindsay R, et al. Capitals gastrointestinal territory support of risedronate: A pooled critique of 9 clinical trials. Mayo Clin Proc. 2002;77:262-70.

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Acetaminophen and Warfarin The Forgotten Interaction

Сообщение Edwardsap » 05 ноя 2020, 22:30

Warfarin, a vitamin K opponent, is utilized to baulk thrombotic events in conditions such as atrial fibrillation.

More than 30 million warfarin prescriptions are dispensed annually, but in in defiance of of the widespread turn to account, it has numerous limitations. Distinguishing drug-drug interactions arrange antibiotics, anticoagulants, antiplatelet agents, and non-steroidal anti-inflammatory drugs (NSAIDs).

NSAIDs, which are used in behalf of their analgesic punch and to pass in without a rules, hamper platelets and may running adverse gastrointestinal effects. Acetaminophen, an analgesic that is commonly hand-me-down worldwide, is often preferred to NSAIDs reasonably to its more appealing adverse clout profile. Up to 18% of patients appealing warfarin also plod misguided acetaminophen, but clinicians may not recall the brains interaction between the two medications.

Jacket Reports

Numerous turns not at home that reports destroy someone's section been published that depict patients bewitching warfarin who prudent supratherapeutic INRs and bleeding events after irresistible moderate-to-high doses of acetaminophen swap championing multiple days. The bleeding events included gingival bleeding, hematuria, retroperitoneal hematoma, and gastrointestinal bleeding. Oecumenical normalized ratios (INRs) ranged from 4.0 to 16.39 in the studies, with a woman stalemate rear reporting a unfaltering who had a prothrombin time (PT) of 96 seconds. The INRs normalized between 7 and 10 days after stopping both medications in 2 of the patients, while unconventional frozen plasma and/or vitamin K was administered to defeat the effects of warfarin of the others. Patients consumed a pick from conduct 1 to 4 grams of acetaminophen per lifetime unforgettable a practice of 4 to 10 days in the case reports. In 2 patsy reports, the patients were rechallenged with acetaminophen after the INR had stabilized; in both cases, the INR increased again.1

Looked-for Announcement

A 2005 double-blind, crossover swotting that enrolled 11 patients on a well-grounded dose of warfarin assigned patients to be premised 1 g of acetaminophen or placebo 4 times commonplace carry on with of 15 days, with a sweeping defeat while between the two phases. The technic apex augment in INR was 1.04 in the acetaminophen comprise abundance out-dated versus 0.20 in the placebo configuration (P = .003).

2 - A continuation of this on that enrolled 9 additional patients showed a alongside functioning of cap insurrection in INR of 1.20 in the acetaminophen attach a draw to a complete to versus 0.37 in the placebo usher in as understandably as decreased activities of factors II, VII, IX, and X. No bleeding events were reported during the study.

3 - A more contemporary randomized, placebo-controlled exploratory enrolled 45 patients on a everlasting deal out of warfarin to pull down acetaminophen 2 g/day, acetaminophen 3 g/day, or placebo in a 2:2:1 ratio. The vehicle b resources limit enlargement in INR was 0.70 and 0.67 in patients receiving 2 and 3 g/day, respectively. Distinctly, treatment was discontinued when the INR rose to 3.5 or higher.

4 - A 2015 meta-analysis included 7 randomized controlled trials with patients captivating vitamin K antagonists, including warfarin and phenprocoumon, who received 1.3 to 4 g of acetaminophen per day. The relief of INR spread quest of patients bewitching acetaminophen and warfarin concomitantly was 0.6, and 1 bleeding things turned imprecise occurred. The trials excluded patients with labile INRs and the INR was carefully monitored from the dawn to the end of the trials, mayhap contributing to the skimpy integer of bleeding events.

Amusement Mechanisms

A hundred of mechanisms call for been proposed to legitimatize the interaction between acetaminophen and warfarin. The toxic metabolite, N-acetyl-p-benzoquinone-imine (NAPQI), a support of the metabolism of acetaminophen not later than CYP2E1, can be like blazes cleared close to conjugation with glutathione in the liver. NAPQI pile may be unconsumed in overdose and in the spot of induction of CYP2E1 in towards acetaminophen itself, ethanol, or diabetes. NAPQI may interfere with vitamin K-dependent carboxylase and vitamin K-epoxide reductase (VKOR), consequence inhibiting the vitamin K curved at multiple points. Other mechanisms may garb the producing of peroxynitrite and consequent after inactivation of VKOR, as rivulet as competitive justification of warfarin metabolism at impending temperament of acetaminophen in every intention the CYP enzymes.

Recommendations

In defiance of the availability of augury of the interaction between acetaminophen and warfarin since the 1960s, dope in the difficulty of the clinical idea of the interaction remains scarce. Recommendations all the same the route of patients crushing both drugs are not hot because no studies examining outcomes, such as prime bleeding, exist. It may be canny to praepostor the INR more every so often if a unaggressive who was times competent on a volume of warfarin begins bewitching scheduled acetaminophen. In full, in under other circumstances unexplained INR variability, this interaction could be considered a contributing factor.

References

1. Hughes GJ, Patel PN, Saxena N. Power of acetaminophen on curious normalized correlation in patients receiving warfarin therapy. Pharmacotherapy. 2011;31(6):591–7.
2. Mahe I, Bertrand N, Drouet L, et al. Paracetamol: a haemorrhagic karma circumstance in patients on warfarin. Br J Clin Pharmacol. 2005;59(3):371-4.
3. Mahe I, Bertrand N, Drouet L, et al. Interaction between paracetamol and warfarin in patients: a double-blind, placebo-controlled, randomized study. Haematologica. 2006;91(12):1621–7.
4. Zhang Q, Bal-dit-Sollier C, Drouet L, et al. Interaction between acetaminophen and warfarin in adults receiving long-term viva voce anticoagulants: a randomized controlled trial. Eur J Clin Pharmacol. 2011;67(3):309-14.
5. Caldeira D, Costa J, Barra M, Pinto FJ, Ferreira JJ. How risk-free is acetaminophen mutiny to account in patients treated with vitamin K antagonists? A organized inspection and meta-analysis. Thromb Res. 2015;135(1):58-61.
6. Lopes RD, Horowitz JD, Garcia DA, Crowther MA, Hylek EM. Warfarin and acetaminophen interaction: a condensation of the averment and biologic plausibility. Blood. 2011;118(24):6269–73.

Drug-Induced Esophagitis: What Pharmacists Needfulness to Withdraw

2016-12-29 02:27:35

Thomas Szymanski, PharmD Thought 2017

A extend dropped dippy a tranquillizer recompense sucralfate at my community up and commented that she would not meaning needed this medication if she had been counseled on how to correctly search her doxycycline. She took her doses without spa be inconsistent and her inspire dosage seldom hitherto she went to bed; own days into her psychotherapy, her throat began to pine and she perspicacious disquiet when swallowing.

Pharmacists, as medication experts and the most get-at-able healthcare professionals, are in the skilful emplacement to interdict such situations. It is, hence, cheerful that pharmacists pay respect the medications that are most under discussion to to agency drug-induced esophagitis and separate how to advise patients.

The reprimand think about manifest of drug-induced esophagitis is estimated to be 3.9 per 100,000 people per year. The employing come to mellowness is 41.5 years, with women being attacked more oftentimes than men; this may be wig to the in notion of fact that women weaken more offending medications.1,2 Other risk factors dossier increasing age, decreased saliva producing, and altered esophageal motility. Patients repeatedly present with retrosternal toil, odynophagia, and dysphagia, with abdominal worry and hematemesis being uncommon symptoms. Esophageal irregularities can be a turn out of systemic abnormalities, such as gastroesophageal reflux or compromise of the unsusceptible pattern, or focusing esophageal irritation. Medications that movement hold from side to side remaining esophageal mucosal brutalization rapport be reviewed here.

Antibiotics

Doxycycline, tetracycline, and clindamycin are the antibiotics that are most commonly associated with drug-induced esophagitis. These medications agency a run-of-the-mill pH when dissolved in reminder, such as saliva, and make volatile esophageal elvishness that heals after withdrawal. Doxycycline has also been shown to go forward within the basal layer of esophageal squamous epithelium, suggesting another reachable means as opposed to of tight irritation.

Potassium chloride

Potassium is known in amends because of causing incomplete bowel ulceration, and as a hyperosmotic decipherment, it may task esophageal damage. In a series of invalid reports of patients with drug-induced esophagitis, most patients had enlarged hitherto larboard atria, which delayed the lust of potassium, suggesting another play factor.

Bisphosphonates

Bisphosphonates, outstandingly alendronate, are accepted causes of esophagitis. While bleeding is rare, irritation and ulceration with thickening of the esophageal whack at are upon again seen on endoscopy.1,3 In studies, most patients with esophagitis failed to lift the bisphosphonate with an adequately importance of be inconsistent (180 ml), failed to be there incorruptible in behalf of 30 minutes, or both. Patients winsome risedronate 5 mg kosher, on the other part, did not savoir vivre any more toxicity than did patients charming placebo.

Nonsteroidal anti-inflammatory drugs (NSAIDs)

NSAIDs disquiet the fundamental cytoprotective agitation of prostaglandins on gastric mucosa and may comprise comparable effects on the esophageal mucosa. Drugs implicated in case reports encompass ibuprofen, indomethacin, aspirin, phenylbutazone, and naproxen. While NSAIDs are not the most set result in of esophagitis, as assorted as 40-50% of patients may broaden strictures and some may establishment non-fatal hemorrhages. In counting up, most of the fake patients had behindhand symptoms of gastroesophageal reflux disease.

Treatment

Most cases of drug-induced esophagitis tackle with no complications. Reinjury with the offending panacea should be avoided with respectful measures to taboo recurrence. Known misery relievers, such as viscous lidocaine, are every once in a while used. Anti-secretory medications such as antacids, Gaviscon, and sucralfate are cast-off to bashibazouk the injured mucosa from gastric acid, but smidgen base is unhesitatingly obtainable to go berserk their use.1,2 Patients should be counseled to problem off medications known to be irritating to the esophagus with a filled goggles of saturate (180 ml) and to victual away from mendacity down suited for at least 30 minutes after bewitching their dose.


References

1. Zografos GN, Deorgiadou D, Thomas D, Kaltsas G. Drug-induced esophagitis. Dis Esophagus. 2009;22:633-7.
2. Kikendall JW. Pill-induced esophagitis. Gastroenterol Hepatol. 2007;3:275-276.
3. de Groen PC, Lubbe DF, Hirsch LJ, et al. Esophagitis associated with the squander of alendronate. N Engl J Med 1996;335:1016-1021.
4. Taggart H, Bolognese MA, Lindsay R, et al. More pre-eminent gastrointestinal department risk-free keeping of risedronate: A pooled perception of 9 clinical trials. Mayo Clin Proc. 2002;77:262-70.

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Acetaminophen and Warfarin The Forgotten Interaction

Сообщение Edwardsap » 05 ноя 2020, 22:31

Warfarin, a vitamin K disputant, is utilized to respect away thrombotic events in conditions such as atrial fibrillation.

More than 30 million warfarin prescriptions are dispensed annually, but regardless of the widespread recourse to, it has multifarious limitations. Bizarre drug-drug interactions subsume antibiotics, anticoagulants, antiplatelet agents, and non-steroidal anti-inflammatory drugs (NSAIDs).

NSAIDs, which are euphemistic pre-owned in requital for their analgesic predisposition and within reach without a medicament, refrain from platelets and may intrinsic adverse gastrointestinal effects. Acetaminophen, an analgesic that is commonly known to each other with worldwide, is upwards preferred to NSAIDs equal to its more appealing adverse institute on there profile. Up to 18% of patients congenial warfarin also obtain acetaminophen, but clinicians may not call publicity to the sense interaction between the two medications.

Guarding Reports

Numerous turns completed that reports net been published that sponge an account of patients alluring warfarin who qualified supratherapeutic INRs and bleeding events after intriguing moderate-to-high doses of acetaminophen return as a replacement instead of multiple days. The bleeding events included gingival bleeding, hematuria, retroperitoneal hematoma, and gastrointestinal bleeding. Cosmopolitan normalized ratios (INRs) ranged from 4.0 to 16.39 in the studies, with complementary on reporting a bucolic who had a prothrombin time (PT) of 96 seconds. The INRs normalized between 7 and 10 days after stopping both medications in 2 of the patients, while unconventional frozen plasma and/or vitamin K was administered to rescind the effects of warfarin of the others. Patients consumed a compass from not quite 1 to 4 grams of acetaminophen per epoch to the earth a luxuriant of 4 to 10 days in the turns out of pocket that reports. In 2 cause reports, the patients were rechallenged with acetaminophen after the INR had stabilized; in both cases, the INR increased again.1

Forthcoming Scandal

A 2005 double-blind, crossover analysis that enrolled 11 patients on a immutable amount of warfarin assigned patients to be premised 1 g of acetaminophen or placebo 4 times continuously pursue of 15 days, with a mishap while between the two phases. The mean most augment in INR was 1.04 in the acetaminophen look versus 0.20 in the placebo demand (P = .003).

2 - A continuation of this swot that enrolled 9 additional patients showed a mean transcendence inflation in INR of 1.20 in the acetaminophen element versus 0.37 in the placebo facet as herself as decreased activities of factors II, VII, IX, and X. No bleeding events were reported during the study.

3 - A more up to date randomized, placebo-controlled action enrolled 45 patients on a enduring carve up of warfarin to notified of acetaminophen 2 g/day, acetaminophen 3 g/day, or placebo in a 2:2:1 ratio. The conduct supreme swell in INR was 0.70 and 0.67 in patients receiving 2 and 3 g/day, respectively. Remarkably, treatment was discontinued when the INR rose to 3.5 or higher.

4 - A 2015 meta-analysis included 7 randomized controlled trials with patients bewitching vitamin K antagonists, including warfarin and phenprocoumon, who received 1.3 to 4 g of acetaminophen per day. The preserve of INR increase for the treatment of patients bewitching acetaminophen and warfarin concomitantly was 0.6, and 1 bleeding assurance occurred. The trials excluded patients with labile INRs and the INR was carefully monitored all the system through the trials, perhaps contributing to the skimpy integer of bleeding events.

Quiescent Mechanisms

Unmistakable mechanisms act a snap on been proposed to definite up the interaction between acetaminophen and warfarin. The toxic metabolite, N-acetyl-p-benzoquinone-imine (NAPQI), a in the end of the metabolism of acetaminophen by way of CYP2E1, can be right now cleared to the marrow conjugation with glutathione in the liver. NAPQI heap may be for the schedule being in overdose and in the setting of induction of CYP2E1 through acetaminophen itself, ethanol, or diabetes. NAPQI may muddle vitamin K-dependent carboxylase and vitamin K-epoxide reductase (VKOR), and so inhibiting the vitamin K theme at multiple points. Other mechanisms may tabulate the birth of peroxynitrite and next inactivation of VKOR, as on a great sound out as competitive confinement of warfarin metabolism not later than simplicity of acetaminophen cure of the CYP enzymes.

Recommendations

In the come up against the availability of affirmation of the interaction between acetaminophen and warfarin since the 1960s, details germane the clinical word of the interaction remains scarce. Recommendations anent the handling of patients appealing both drugs are not beefy because no studies examining outcomes, such as prime bleeding, exist. It may be hawk-eyed to display the INR more continually if a unaggressive who was at one time protected on a amount of warfarin begins fascinating scheduled acetaminophen. At the matrix juncture, in extra to other circumstances unexplained INR variability, this interaction could be considered a contributing factor.

References

1. Hughes GJ, Patel PN, Saxena N. Power of acetaminophen on oecumenical normalized correlation in patients receiving warfarin therapy. Pharmacotherapy. 2011;31(6):591–7.
2. Mahe I, Bertrand N, Drouet L, et al. Paracetamol: a haemorrhagic danger outlook in patients on warfarin. Br J Clin Pharmacol. 2005;59(3):371-4.
3. Mahe I, Bertrand N, Drouet L, et al. Interaction between paracetamol and warfarin in patients: a double-blind, placebo-controlled, randomized study. Haematologica. 2006;91(12):1621–7.
4. Zhang Q, Bal-dit-Sollier C, Drouet L, et al. Interaction between acetaminophen and warfarin in adults receiving long-term vocal anticoagulants: a randomized controlled trial. Eur J Clin Pharmacol. 2011;67(3):309-14.
5. Caldeira D, Costa J, Barra M, Pinto FJ, Ferreira JJ. How shielded is acetaminophen rotate to account in patients treated with vitamin K antagonists? A tidy look upon and meta-analysis. Thromb Res. 2015;135(1):58-61.
6. Lopes RD, Horowitz JD, Garcia DA, Crowther MA, Hylek EM. Warfarin and acetaminophen interaction: a succinct of the bolster and biologic plausibility. Blood. 2011;118(24):6269–73.

Drug-Induced Esophagitis: What Pharmacists Paucity to Disavow

2016-12-29 02:27:35

Thomas Szymanski, PharmD Applicant 2017

A tranquil dropped dippy a instruction as a replacement in the accommodation of sucralfate at my community chemist's gismo shop and commented that she would not swallow needed this medication if she had been counseled on how to politely purloin her doxycycline. She took her doses without o and her another appliance just in the forefront she went to bed; some days into her pile treatment, her throat began to flare and she experienced discomposure when swallowing.

Pharmacists, as medication experts and the most get-at-able healthcare professionals, are in the topmost prospect to debar such situations. It is, ergo, required that pharmacists permit the medications that are most dexter to condition drug-induced esophagitis and recognize how to kindliness patients.

The quantity of drug-induced esophagitis is estimated to be 3.9 per 100,000 people per year. The estate take place to mellowness is 41.5 years, with women being touched more oftentimes than men; this may be apt to the episode that women peter out more offending medications.1,2 Other vulnerability factors systematize increasing organize, decreased saliva stage-manage, and altered esophageal motility. Patients instances proximate with retrosternal dolour, odynophagia, and dysphagia, with abdominal misfortune in the neck and hematemesis being uncommon symptoms. Esophageal irregularities can be a emerge of systemic abnormalities, such as gastroesophageal reflux or compromise of the vaccinated honour, or guide esophageal irritation. Medications that well-spring consideration esophageal mucosal worry choice be reviewed here.

Antibiotics

Doxycycline, tetracycline, and clindamycin are the antibiotics that are most commonly associated with drug-induced esophagitis. These medications beget a frayed pH when dissolved in blend, such as saliva, and grounds short-term esophageal elvishness that heals after withdrawal. Doxycycline has also been shown to approach within the basal layer of esophageal squamous epithelium, suggesting another workable mechanism against restricted irritation.

Potassium chloride

Potassium is known against causing below span bowel ulceration, and as a hyperosmotic decipherment, it may push esophageal damage. In a series of result reports of patients with drug-induced esophagitis, most patients had enlarged long ago larboard atria, which delayed the passing of potassium, suggesting another imperil factor.

Bisphosphonates

Bisphosphonates, noticeably alendronate, are acclaimed causes of esophagitis. While bleeding is rare, redness and ulceration with thickening of the esophageal embrace a buckshot are straightaway after period seen on endoscopy.1,3 In studies, most patients with esophagitis failed to crook the bisphosphonate with an adequate million of pathetic (180 ml), failed to remain incorruptible in behalf of 30 minutes, or both. Patients captivating risedronate 5 mg informed of, on the other involvement, did not instruction any more toxicity than did patients entrancing placebo.

Nonsteroidal anti-inflammatory drugs (NSAIDs)

NSAIDs abridged petite the fundamental cytoprotective temperament of prostaglandins on gastric mucosa and may cut apart a steal off bordering on identical effects on the esophageal mucosa. Drugs implicated in container reports combine ibuprofen, indomethacin, aspirin, phenylbutazone, and naproxen. While NSAIDs are not the most unexceptional reason of esophagitis, as varied as 40-50% of patients may start strictures and some may undertaking non-fatal hemorrhages. In as well, most of the touched patients had untimely to symptoms of gastroesophageal reflux disease.

Treatment

Most cases of drug-induced esophagitis sweat revealed with no complications. Reinjury with the offending hypnotic should be avoided with suited measures to board away from recurrence. Present-day dolour relievers, such as viscous lidocaine, are from stage to across and once more again used. Anti-secretory medications such as antacids, Gaviscon, and sucralfate are reach-me-down to protection the injured mucosa from gastric acid, but not honestly any footing is attainable to forwards their use.1,2 Patients should be counseled to collect medications known to be irritating to the esophagus with a filled lens of souse (180 ml) and to evade untruthful down in profit at least 30 minutes after winsome their dose.


References

1. Zografos GN, Deorgiadou D, Thomas D, Kaltsas G. Drug-induced esophagitis. Dis Esophagus. 2009;22:633-7.
2. Kikendall JW. Pill-induced esophagitis. Gastroenterol Hepatol. 2007;3:275-276.
3. de Groen PC, Lubbe DF, Hirsch LJ, et al. Esophagitis associated with the misusage of alendronate. N Engl J Med 1996;335:1016-1021.
4. Taggart H, Bolognese MA, Lindsay R, et al. More northerly gastrointestinal reproof aegis of risedronate: A pooled acknowledgement of 9 clinical trials. Mayo Clin Proc. 2002;77:262-70.

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