Prescription drug policy question

Accutane is a drug that has benefits with great risks of harm.  It was highly effective at treating sever acne but can cause serious birth defects when given to pregnant women.  Normally, prior to being allowed onto the market place, prescription drugs undergo chemical analysis, laboratory testing, and clinical trials, by the FDA to make sure the drug is safe.   The struggle of law dealing with drugs that benefit many but harm a few is a dedicating balancing of interest.  It is also a question of public policy.  Do we want to prevent drugs that can help many from entering the market balance when they may harm a few.  Can we devise a scheme to limit the harm if we warning the public.  Can we warn doctors that prescribe these drugs and what do we do when the fail to do their jobs correctly?  Do is to blame when the medical practitioner fails to do his or her job correctly.  These are policies questions that our society must address.  These are also questions that legal system has to address when lawsuits are brought by those injured by drugs like Accutane.