Current conditions: legalized, heavily regulated production, addictive drugs require a prescription, hard drugs require the seller to give you a little speech on safe use every time you purchase them

Social democracy: same, but a little more lax, because if you fuck yourself up there's free medicine. The speech is getting shorter because there's routine PSAs

Some sort of ancom thing: some people organized a nicely regulated drug production, education, and distribution system, which you're free to use. You can find worse-regulated drugs if you go out of your way, but everyone will chew you out for doing it, especially your doctor. You might have to move to a specialized community if you really want to be contrarian about the common drug policy

FALGSC: you can set whatever limits you want for yourself and they will be enforced. You have to spend at least one week a year sober though, so people who wirehead themselves have a chance to revise that decision