median 24 hour acidity decreased with all h2-receptor antagonists from 25.1 mmol/l on placebo to 10 mmol/l ( -60.1 % ) during cimetidine , to 3.2 mmol/l ( -87.25 % ) during ranitidine and to 2.5 mmol/l ( -90.0 % ) during famotidine treatment ( p less than 0.0005 ) .
C2757005
h2-receptor antagonists
C0034665
ranitidine