The Kefauver-Harris Amendment of 1962 required that a drug be A. not only safe but effective. B. inventoried by the pharmacist every two years. C. used prior to proof of effectiveness, if necessary. D. labeled as either an over-the-counter (OTC) or prescription drug.
Your answer is A.not only safe but effective. Required drug manufacturers to provide proof of the effectiveness and safety of their drugs before approval.
