title: Effect of omeprazole, a substituted benzimidazole, on 24-h intragastric acidity in patients with peptic ulcer disease.
abstract: Intragastric pH was measured during physiological conditions over 24-h periods in patients with peptic ulcer disease. After single oral doses of 20, 40, and 80 mg omeprazole we found a dose-dependent reduction in mean intragastric acidity ranging from 38% to 99%. After treatment for 1 week with omeprazole, 40 mg daily, with or without an initial loading dose of 80 mg, intragastric acidity was decreased by more than 99%. This is a more pronounced decrease in acidity than can be achieved even with very high doses of histamine H2-receptor antagonists.
mesh_terms: D000328:Adult; D000897:Anti-Ulcer Agents / Q000627:therapeutic use*; D001562:Benzimidazoles / Q000008:administration & dosage / Q000627:therapeutic use*; D002940:Circadian Rhythm; D004305:Dose-Response Relationship, Drug; D004381:Duodenal Ulcer / Q000188:drug therapy*; D005260:Female; D005744:Gastric Acid / Q000378:metabolism*; D005745:Gastric Acidity Determination; D006801:Humans; D008297:Male; D008875:Middle Aged; D009853:Omeprazole; D012636:Secretory Rate / Q000187:drug effects; D013276:Stomach Ulcer / Q000188:drug therapy*
chemical_list: D000897:Anti-Ulcer Agents; D001562:Benzimidazoles; D009853:Omeprazole