the data suggest that ( 1 ) persistent failure of antacids and/or cimetidine to maintain gastric ph above 4 is yet another indicator of often unappreciated infection , ( 2 ) maintaining gastric ph above 4 largely prevents gastrointestinal hemorrhage , and ( 3 ) cimetidine is not as consistently effective as antacids in maintaining gastric ph above 4 .
C0017181
gastrointestinal
C0008783
cimetidine