I disagree that having a tripsitter present makes it not self-medication. If the substance isn’t being prescribed or administered by the third party, and they aren’t medical professionals then it’s still self-administered even if there’s a third party there. So then it becomes a question of intent. Why are they taking it? If it’s because it helps or treats some aspect of themselves that they are unhappy with then it’s medication. I’m genuinely curious why you’d think hallucinogens wouldn’t fit into that category, or if it’s just the presence of a trip sitter that you think negates the medicinal aspect.