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.
RCT Entities:
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.
Authors: Henry C Lin; Charlene Prather; Robert S Fisher; James H Meyer; Robert W Summers; Mark Pimentel; Richard W McCallum; Louis M A Akkermans; Vera Loening-Baucke Journal: Dig Dis Sci Date: 2005-06 Impact factor: 3.199
Authors: H P Parkman; J L Urbain; L C Knight; K L Brown; D M Trate; M A Miller; A H Maurer; R S Fisher Journal: Gut Date: 1998-02 Impact factor: 23.059
Authors: Mohammad Hassan Emami; Mohammad Mehdi Saberfiroozi; Abbas Arj; Ali Reza Taghavi; Kamran Bagheri-Lankarani; Najaf Dehbashi; Mohammad Reza Fattahi; Mahvash Alizadeh; Mohammad Javad Kaviani; Rahim Bahri-Najafi; Bita Geramizadeh; Abbas Esmaeili Journal: World J Gastroenterol Date: 2006-10-21 Impact factor: 5.742