“…The lowest recommended dose for each drug is as follows: cimetidine, 400 mg; ranitidine, 150 mg; famotidine, 20 mg; and nizatidine, 150 mg, twice daily for 6–12 weeks. These regimens produced healing in 17–70% and improvement of symptoms in 32–82% of patients (94–106). Rates of improvement of 45–75% have been reported with high doses of H 2 ‐receptor antagonists (cimetidine, 800 mg; ranitidine, 300 mg; famotidine, 40 mg; nizatidine, 300 mg; all twice daily) (91, 103, 123).…”