What kind of drugs would medically be considered "hallucinogenic"/cause visions? If anyone who knows firsthand could give me an account of their experiences with trips on these, I'd appreciate it. I'm specifically interested in knowing about shrooms and opium, whether they belong in the same category or not. Also, what types of drugs were popular in the 60's and 70's with the early hippies, aside from weed? I'm currently trying to research for a story I want to write. I have no personal experience with drugs though. I'd like to be accurate, do the story justice, as well as those who inspired it. I am not trying to make a mockery out of anyone, and I'm not going to judge, so please don't worry about that.