title: Controlled endoscopic study on gastroduodenal safety of acetylcysteine after oral administration.
mesh_terms: D000111:Acetylcysteine / Q000009:adverse effects* / Q000627:therapeutic use; D000284:Administration, Oral; D000328:Adult; D000368:Aged; D001991:Bronchitis / Q000188:drug therapy; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004378:Duodenal Diseases / Q000139:chemically induced*; D004724:Endoscopy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010919:Placebos; D013272:Stomach Diseases / Q000139:chemically induced*
chemical_list: D010919:Placebos; D000111:Acetylcysteine