Most drugs affected by fentanyl are illegal drugs, the government overprescribing has been around before the "legalize it". I believe its up to the consumer to discern whether a drug is for them. A drug user that's not desperate to get it by any means necessary will be less likely to encounter poor illegal drug production quality assurance. I don't believe legalizing it will reduce drug use, but it will mostly enable a Marley of safer drug production as far as immediate harmful effects. I'm not convinced legalizing drugs is long term beneficial to human mental health, but it would have the coeffect of people thinking Kore purely about what it is to be free and responsible