the purpose of the present trial was to verify the efficacy and safety of long-term ranitidine treatment ( 150 mg at bedtime for 1 year ) for the maintenance of duodenal ulcer healing in 22 patients following a successful short-term course of therapy with ranitidine at the full dose of 300 mg per day .
C0034665
ranitidine
C0013295
duodenal ulcer