sixty patients with endoscopically proven healed duodenal ulcers were treated for a year with either pirenzepine ( gastrozepin ; boehringer ingelheim ) 100 mg daily , cimetidine 400 mg at night , or placebo , the monthly relapse rate ( patients per month ) in the first 3 months ( pirenzepine 2,3 , cimetidine 2,3 , placebo 3,0 ) and in the next 9 months ( pirenzepine 0,33 , cimetidine 0,44 , placebo 0,56 ) is lower for pirenzepine and cimetidine than for placebo .
C0013295
duodenal ulcers
C0008783
cimetidine