title: The prevention of upper gastrointestinal tract bleeding in patients in an intensive care unit.
mesh_terms: D000863:Antacids / Q000627:therapeutic use*; D002927:Cimetidine / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D003422:Critical Care / Q000379:methods*; D005260:Female; D005744:Gastric Acid / Q000378:metabolism; D006471:Gastrointestinal Hemorrhage / Q000517:prevention & control*; D006146:Guanidines / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011897:Random Allocation; D012306:Risk
chemical_list: D000863:Antacids; D006146:Guanidines; D002927:Cimetidine