A comparative study of the action of demerol and opium alkaloids in relation to biliary spasm.
D000470:Alkaloids; D005767:Gastrointestinal Diseases; D008614:Meperidine; D009892:Opium; D013035:Spasm
D000470:Alkaloids; D009892:Opium; D008614:Meperidine
DEMEROL; OPIUM/alkaloids