Scintigraphic assessment of the intragastric distribution and gastric emptying of an encapsulated drug: the effect of feeding and of a proton pump inhibitor.

Abstract:

BACKGROUND:Local delivery of therapeutic agents to the stomach may be a useful strategy in the treatment of Helicobacter pylori infection. We aimed to see whether the intragastric distribution and gastric retention of a therapeutic agent could be improved, either by giving omeprazole or by dosing after a meal. METHODS:Twelve healthy volunteers took part in this double-blind placebo-controlled crossover study comparing the effects of omeprazole 20 mg twice daily for 5 days with placebo, and the fasted with the fed state, on the gastric emptying and intragastric distribution of a soluble scintigrapic marker contained in a drug capsule. RESULTS:Dosing after food profoundly prolonged gastric residence of the drug label, prolonging mean time to 50% emptying (T50) from 0.5 +/- 0.1 h in the fasted state to 2.0 +/- 0.2 h when given after food. Food also improved intragastric distribution by increasing delivery to the body and fundus. Omeprazole enhanced the effect of food, prolonging T50 to 2.9 +/- 0.3 h, but had no effect in fasted subjects. CONCLUSIONS:Dosing after food markedly improves the aspects of local drug delivery to the stomach investigated in this study, and omeprazole enhances this effect. Post-prandial dosing may, therefore, be useful for improving delivery of some anti-Helicobacter agents.

journal_name

Aliment Pharmacol Ther

authors

Atherton JC,Washington N,Bracewell MA,Sutton LJ,Greaves JL,Perkins AC,Hawkey CJ,Spiller RC

doi

10.1111/j.1365-2036.1994.tb00320.x

subject

Has Abstract

pub_date

1994-10-01 00:00:00

pages

489-94

issue

5

eissn

0269-2813

issn

1365-2036

journal_volume

8

pub_type

临床试验,杂志文章,随机对照试验
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