Your story reads like fiction!

How stupid and how immature to put drugs in people's drinks. It spoils the idiosyncratic decision to try psychedelics if one feels curiosity about them. I've had a few trips myself, most were worth their experience for me and I wouldn't want to miss them. However, I was strict about who I wanted to go on a trip with and when, and would have found it infamous for someone to drug me without my knowledge. By the time I was in my mid-twenties, I had been asked countless times to try it. I always said no until I felt I was ready. The fact that you are repeatedly asked whether you want to take this or that substance requires that you move in the corresponding scenes, like we were in the techno clubbing or goa party scene back then.

As long as you actively seek loss of control, I have found that getting involved takes the fear out of the whole thing, even though it is a risky act. However, without the willful preconceived willingness to let such things affect you, it is impossible to develop a positive attitude towards it.

In any case, you have put what you remembered into words very vividly and excellently portrayed your feelings at the time for the reader.