title: Occurrence of opium alkaloids in commercial herbal stomach remedy preparation.
mesh_terms: D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D006801:Humans; D009020:Morphine / Q000032:analysis*; D004366:Nonprescription Drugs / Q000032:analysis*; D010146:Pain / Q000188:drug therapy*; D013272:Stomach Diseases / Q000188:drug therapy
chemical_list: D004366:Nonprescription Drugs; D009020:Morphine