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Author: Admin | 2025-04-28
Hours following the day-6 aspirin dose [53%]. An interaction was still observed, but minimized, when ibuprofen 400 mg given once-daily was administered as early as 8 hours prior to the immediate-release aspirin dose [90.7%]. However, there was no interaction with the antiplatelet activity of aspirin when ibuprofen 400 mg, given once daily, was administered 2 hours after (but not concomitantly, 15 min, or 30 min after) the immediate-release aspirin dose [99.2%].In another study, where immediate-release aspirin 81 mg was administered once daily with ibuprofen 400 mg given three times daily (1, 7, and 13 hours post-aspirin dose) for 10 consecutive days, the mean % serum thromboxane B2 (TxB2) inhibition suggested no interaction with the antiplatelet activity of aspirin [98.3%]. However, there were individual subjects with serum TxB2 inhibition below 95%, with the lowest being 90.2%.When a similarly designed study was conducted with enteric-coated aspirin, where healthy subjects were administered enteric-coated aspirin 81 mg once daily for 6 days and ibuprofen 400 mg three times daily (2, 7, and 12 h post-aspirin dose) for 6 days, there was an interaction with the antiplatelet activity at 24 hours following the day-6 aspirin dose [67%] [see DRUG INTERACTIONS].PharmacokineticsAbsorptionIbuprofen and famotidine are rapidly absorbed after a single dose administration of DUEXIS. Mean Cmax values for ibuprofen are 45 μg/mL and are reached approximately 1.9 hours after oral administration of DUEXIS. The C and AUC0-24hours values for the 800 mg of ibuprofen contained in a DUEXIS tablet are bioequivalent to the values for 800 mg of ibuprofen administered alone. Cmax values for famotidine were 61 ng/mL and are reached at approximately 2 hours after oral administration of DUEXIS.A high-fat meal reduced famotidine Cmax and AUC by approximately by 15% and 11%, respectively, and reduced ibuprofen AUC by approximately 14% but did not change Cmax . Food delayed famotidine Tmax and ibuprofen Tmax by approximately 1 hour and 0.2 hour, respectively.DistributionIbuprofen is extensively bound to plasma proteins.Fifteen to 20% of famotidine in plasma is protein bound.EliminationMetabolismThe only metabolite of famotidine identified in man is the S-oxide.ExcretionIbuprofen is eliminated from the systemic circulation with a mean half-life
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