Yes, but to address rampant drug abuse- especially the kind where users are sharing needles-, you'd have to address a host of systemic social problems, poverty foremost amongst them. I agree that's a great idea, but also one that's not in the interests of the pressure groups keeping pharmaceuticals expensive either.

Just in case anyone still needs a source for this kind of thing, here's an example: https://www.webmd.com/mental-health/addiction/news/20180326/...