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Pharmacokinetic profile of immediate‐release omeprazole in patients with gastro‐oesophageal reflux associated with gastroparesis
Author(s) -
WO J. M.,
EVERSMANN J.,
MANN S.
Publication year - 2010
Publication title -
alimentary pharmacology and therapeutics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.308
H-Index - 177
eISSN - 1365-2036
pISSN - 0269-2813
DOI - 10.1111/j.1365-2036.2009.04203.x
Subject(s) - omeprazole , medicine , gastroparesis , gastroenterology , reflux , gastro , pharmacokinetics , gerd , gastric emptying , stomach , disease
Aliment Pharmacol Ther 31 , 516–522 Summary Background Immediate‐release omeprazole has a more rapid absorption compared with delayed‐release omeprazole in asymptomatic volunteers. However, effects of delayed gastric emptying on omeprazole absorption remain unknown. Aim To compare pharmacokinetics between immediate and delayed‐release omeprazole in patients with GERD associated with gastroparesis. Methods Open‐label, randomized, cross‐over study was performed. Antireflux and prokinetic medications were discontinued. Subjects were randomized into: (i) Immediate‐release omeprazole 40 mg suspension o.m. for 7 days, wash‐out for 10–14 days, followed by delayed‐release omeprazole 40 mg capsule o.m. for 7 days, or (ii) the same schedule in reverse order. On day 7, omeprazole concentrations were obtained before and up to 5 h after taking the study drug. Patient Assessment of GI Disorders–Symptom Severity Index was obtained. Results A total of 12 women (mean age 51 years) completed the protocol. Time to maximal omeprazole concentration was significantly shorter for omeprazole. Maximal concentration was significantly greater for omeprazole, but total area under concentration–time curves was similar. Pharmacokinetic profile was less variable for immediate compared with delayed‐release omeprazole. Conclusions Immediate‐release omeprazole was associated with a more rapid absorption and less variable pharmacokinetic profile compared with delayed‐release omeprazole in reflux patients associated with gastroparesis.