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Evaluation of the pharmacokinetic interaction between esomeprazole (40 mg) and acetylsalicylic acid (325 mg) in healthy volunteers.

Author(s): Niazi M, Andersson T, Naucler E, Sundin M, Naesdal J

Affiliation(s): AstraZeneca R&D, Molndal, Sweden. Mohammad.Niazi@astrazeneca.com

Publication date & source: 2009-09, Int J Clin Pharmacol Ther., 47(9):564-9.

Publication type: Randomized Controlled Trial

OBJECTIVE: To evaluate the effect of esomeprazole on the pharmacokinetics of low-dose acetylsalicylic acid (ASA) during repeated co-administration. METHODS: This was an open, randomized, 3-way crossover study in 55 healthy volunteers. Treatment periods comprised 5 days' oral esomeprazole (40 mg) or ASA (325 mg) alone, or in combination, separated by washout of >or= 13 days. The primary pharmacokinetic end points were steady-state area under the concentration-time curve (AUCtau) and observed maximum plasma concentration (Cmax) of ASA +/- esomeprazole. RESULTS: The estimates (90% confidence interval) of the geometric mean ratios for AUCtau and Cmax of ASA +/- esomeprazole were 1.04 (1.00 - 1.09) and 1.12 (1.03 - 1.22), respectively. Corresponding results for esomeprazole +/- ASA were 0.93 (0.89 - 0.98) and 0.96 (0.91 - 1.01), respectively. Administration of esomeprazole and ASA in combination was well tolerated. CONCLUSIONS: There was no pharmacokinetic interaction between esomeprazole (40 mg) and ASA (325 mg) during repeated co-administration in healthy volunteers.

Page last updated: 2009-10-20

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