title: Gastro-intestinal bleeding under treatment with naproxen.
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000188:drug therapy*; D002860:Chromium Radioisotopes; D002986:Clinical Trials as Topic; D004341:Drug Evaluation; D004912:Erythrocytes / Q000378:metabolism; D005243:Feces / Q000737:chemistry; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000139:chemically induced*; D006207:Half-Life; D006801:Humans; D008297:Male; D008738:Methyl Ethers / Q000009:adverse effects; D008875:Middle Aged; D009281:Naphthalenes / Q000009:adverse effects; D010003:Osteoarthritis / Q000188:drug therapy*; D011422:Propionates / Q000009:adverse effects*
chemical_list: D002860:Chromium Radioisotopes; D008738:Methyl Ethers; D009281:Naphthalenes; D011422:Propionates