title: Comparison of once-daily doses of omeprazole (40 and 20 mg) and placebo in the treatment of benign gastric ulcer: a multicenter, randomized, double-blind study.
abstract: OBJECTIVE
  The purpose of this multicenter, randomized, double-blind study, conducted in 520 patients, was to compare the efficacy and safety of omeprazole (40 and 20 mg once daily) with placebo in the treatment of benign gastric ulcer.
  
  
  METHODS
  Treatment with omeprazole or placebo lasted 4 wk; those whose ulcers remained unhealed continued the same treatment regimen for an additional 4 wk. The effects of therapy were determined by endoscopy and assessment of GI symptoms. Safety and tolerability were evaluated through reported adverse events, physical examinations, and laboratory tests.
  
  
  RESULTS
  At weeks 4 and 8, the proportion of patients with healed ulcers was significantly greater in the omeprazole 40- and 20-mg groups than in the placebo group (p < 0.01). At week 8, the healing rate was significantly greater in the 40-mg group than in the 20-mg group (82.7 vs 74.8%, p < 0.05). In patients with large ulcers (>1 cm), the 40-mg regimen was associated with a significantly higher healing rate (78.9%) than both the 20-mg regimen (61.4%) and placebo (34.6%) at week 8 (p < 0.05 vs omeprazole 20 mg; p < 0.01 vs placebo). Healing rates in patients with small ulcers were similar for the 40- and 20-mg groups. Omeprazole was well tolerated, with no significant differences versus placebo in the overall incidence of clinical or laboratory adverse events.
  
  
  CONCLUSIONS
  Omeprazole 40 and 20 mg, administered once daily, healed a significantly greater proportion of patients than did placebo. The 40-mg regimen offered significant advantages over the 20-mg regimen in patients with large ulcers.
authors.affiliation: University of Southern California Medical Center, Los Angeles, USA.
authors.forename: J E
authors.initials: JE
authors.lastname: Valenzuela
authors.forename: D G
authors.initials: DG
authors.lastname: Kogut
authors.forename: A J
authors.initials: AJ
authors.lastname: McCullough
authors.forename: J R
authors.initials: JR
authors.lastname: Colón Pagán
authors.forename: U
authors.initials: U
authors.lastname: Shah
authors.forename: J
authors.initials: J
authors.lastname: Whipple
authors.forename: L R
authors.initials: LR
authors.lastname: Gilde
authors.forename: T J
authors.initials: TJ
authors.lastname: Simon
mesh_terms: D004311:Double-Blind Method; D004334:Drug Administration Schedule; D006801:Humans; D008875:Middle Aged; D009853:Omeprazole / Q000008:administration & dosage* / Q000009:adverse effects / Q000627:therapeutic use; D010146:Pain; D010349:Patient Compliance; D010919:Placebos; D013276:Stomach Ulcer / Q000188:drug therapy* / Q000503:physiopathology; D016896:Treatment Outcome
chemical_list: D010919:Placebos; D009853:Omeprazole