Abstract
Nizatidine, 300 mg once nightly, was compared with cimetidine, 800 mg once nightly, for treatment of 212 adult out-patients with acute duodenal ulcers in an eight-week randomized, double-blind, multicentre trial. Patients were endoscoped at weeks 2, 4 and 8, regardless of ulcer healing status. No significant differences in ulcer healing rates between treatment groups were seen at weeks 2 and 4, but at week 8, nizatidine had a significantly higher ulcer healing rate (P=0.036) than cimetidine (86% versus 74%, respectively). Patients with healed ulcers at either week 2 or week 4 had a final endoscopy performed at week 8. The rate of ulcer recurrence was significantly greater (P=0.021) in the cimetidine group at week 8 compared with the nizatidine group: 21% versus 7.3%, respectively. Increasing tolerance to H2 receptor antagonist therapy with prolonged use may explain the higher recurrence rate of cimetidine. Both drugs provided equally rapid and effective symptomatic relief from epigastric pain after two weeks of therapy. Both were equally safe and free from treatment-related adverse effects.