title: A controlled trial of phenoperidine and diazepam in gastrointestinal endoscopy.
mesh_terms: D002986:Clinical Trials as Topic; D003975:Diazepam / Q000008:administration & dosage*; D004724:Endoscopy; D005773:Gastroscopy; D006801:Humans; D007422:Intestines; D008875:Middle Aged; D010638:Phenoperidine / Q000008:administration & dosage*; D011292:Premedication
chemical_list: D010638:Phenoperidine; D003975:Diazepam