Pharmacokinetics of Immediate-Release vs. Delayed-Release Omeprazole in Gastroparesis

Summary

The purpose of this study is to compare the blood drug levels of two prescribed medications, immediate-release omeprazole 40 mg powder and delayed-release omeprazole 40 mg capsule to determine which drug is better absorbed in patients with a slow stomach emptying (gastroparesis). Delayed-release omeprazole has a protective coating to prevent the drug omeprazole from being neutralized by stomach acid. Immediate-release omeprazole has sodium bicarbonate (antacid) which neutralizes the stomach acid, eliminating the need for a protective coating. Immediate-release omeprazole suspension may have a more rapid pharmacokinetic profile and greater overall drug absorption in gastroparesis.

Timeline

Start

2007-06

Primary completion

2008-12

Completion

2008-12

Publications

• Results Wo JM, Eversmann J, Mann S. Pharmacokinetic profile of immediate-release omeprazole in patients with gastro-oesophageal reflux associated with gastroparesis. Aliment Pharmacol Ther. 2010 Feb 15;31(4):516-22. doi: 10.1111/j.1365-2036.2009.04203.x. Epub 2009 Nov 19.

Drugs

Indications