I'm down with the dictatorship of the proletariat, but fuck off if you're coming for my ketamine, 2CB, DMT, salvia, cannabis, etc. Everything I've read into and history's precedent tells me it's a pretty clear ban on everything.
And no lazy, bullshit responses like, "Well if we're in a communist utopia, I think you'll find there will be no need to take mind-altering substances, which clearly only exclusively exist as a response to captitalism."
Curiosity, spirituality, and exploring the unknown will exist in perpetuity. I just wonder what limitations will be impressed upon society.
Who knows, the reality of drug enforcement within any government system, communist or not, is a product of the historical materialism of the system and it's relationship to other systems and cultures, as are current socialist systems Any other answer is pure ideology.
That being said, if you are willing to forsake whatever the mass line or DoP decides on such matters simply for the sake of mind altering substances, you may wish to consider less potentially authoritarian (to your individualistic ideals) systems of production as your 'ideal'.
This isn't a moral judgement btw, it's just important to know what your actual principles are.