Evaluation of omeprazole in reflux oesophagitis.

In patients with reflux disease, pH monitoring has shown that omeprazole virtually eliminates oesophageal exposure to a pH of less than 4. Motility studies concurrent with pH monitoring have indicated that reflux continues on omeprazole, its effect on acid exposure being entirely dependent on elevation of gastric pH. Omeprazole and placebo have been compared in 64 patients with erosive or ulcerative oesophagitis; the 4-week healing rates were 81% with omeprazole, 20 mg or 40 mg daily, and 6% with placebo. The efficacies of omeprazole at doses of 20 mg and 40 mg daily, were then compared in 164 patients. At 4 weeks, oesophagitis was healed in 70% and 82% of patients for the 20 mg and 40 mg doses respectively (p = 0.05). Eight-week healing rates (79% for 20 mg and 85% for 40 mg) did not differ significantly. Symptom response was excellent for both doses. Relapse of oesophagitis was determined over 6 months for patients healed with omeprazole. Relapse was shown to occur in 88 of 107 patients by 6 months. Omeprazole is a highly effective treatment for erosive/ulcerative peptic oesophagitis, 40 mg daily being marginally superior to 20 mg. Relapse is almost inevitable within 6 months of cessation of therapy.