title: Purpose and methodology in clinical trials on new drugs.
mesh_terms: D000367:Age Factors; D002986:Clinical Trials as Topic; D004304:Dosage Forms; D064420:Drug-Related Side Effects and Adverse Reactions; D006801:Humans; D004364:Pharmaceutical Preparations / Q000592:standards*; D010600:Pharmacology; D010919:Placebos
chemical_list: D004304:Dosage Forms; D004364:Pharmaceutical Preparations; D010919:Placebos