Anarchism

there are lots of things that pharma companies do which are abusive, but the existence of treatments is rarely one of them. Herbal medicine is cool but inconsistent, relying on inconsistent medicinal dosing will kill people. Other comments point out the question is more "how to do industry" than anything else. And no 99.9% of medicine disappearing will in fact kill people.

This is not something you want to speculate on, the point is that in an anarchist society, biochemical engineers, doctors, researchers, would be figuring out methods to make and produce useful medicine. Dont go all primitivist on it because it's a complex problem that capitalism leeches from parasitically.