Ethical problems arise over clinical trials on new drugs.
D002986:Clinical Trials as Topic / Q000592:standards*; D004341:Drug Evaluation / Q000592:standards*; D015507:Drugs, Investigational; D004992:Ethics, Medical; D006805:Human Experimentation; D014481:United States; D014486:United States Food and Drug Administration
D015507:Drugs, Investigational