Abstract
Pentagastrin stimulated gastric secretion was measured in 12 healthy male subjects after repeated once daily oral administration of 20 and 40 mg BY 1023/SK&F 96022--a new substituted benzimidazole derivative. Twenty milligrams inhibited acid output compared with placebo by 24% (2.5-3.5 h) and 26% (24.5-25.5 h) after the first oral intake. Inhibition increased to 56% and 50%, respectively, after the seventh oral dose. Forty milligrams inhibited acid output by a mean of 51% (2.5 to 3.5 h) and 52% (24.5-25.5) after the first oral intake. After the seventh dose mean inhibition rose to 85% and 66%, respectively. The drug was well tolerated, no drug-related changes in clinical laboratory, ECG, heart rate and blood pressure were observed. Fasting gastrin serum concentrations tended to increase with both doses, the mean values being within the normal range. AUC, Cmax and t1/2 of the drug after repeated oral intake were not significantly different when compared with a single dose at either 20 mg or 40 mg.
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