The Antigastrolesive Activity of Rioprostil, a 16-Methyl Prostaglandin-E! Analogue in Healthy Volunteers
1989
The antigastrolesive activity of rioprostil, an orally effective synthetic 16-methyl analogue of prostaglandin-E1, with potent antisecretory and antigastrolesive properties in animals, is evaluated in a series of studies involving 166 healthy male volunteers. Three double-blind, randomized, parallel, placebo-controlled studies are conducted independently at three study centres. In two studies the protective effect of rioprostil against endoscopically-demonstrated mucosal changes caused by concurrent administration of aspirin is examined. The third study evaluates the inhibitory effect of rioprostil on faecal blood loss produced by co-administration of aspirin. Oral doses of rioprostil give significant dose-dependent protection against aspirin-induced mucosal changes. The total mucosal scores at day 3 and day 11 are significantly lower in each of the rioprostil + aspirin groups compared with the aspirin treated group. The total mucosal scores generally decrease with increasing rioprostil dose. Daily faecal...
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