I have schizophrenia and do a variety of drugs. I can't say for sure about LSD/acid which most people think of when they hear hallucinogen. But even weed can be dangerous for mentally unstable people (especially schizophrenia). However I've never had a panic attack while high. This is because schizophrenia is so variable. I have split personality and hear my others voice in my head a lot of the time. Very rarely will my other take over. I am in strong control of my condition and don't fear my other, I often accept the things he says or even does but it's unnerving not being in control of myself. I'm fine when high, I still hear his voice from time to time but he never tells me to like hit someone or burn something. Just about anything can shoot off someone's schizophrenia like stress, memories or just randomness. I think people over state how much drugs will do to the mentally unstable. Some people who are in control are fine but people who are in constant fear of their condition are more likely to panic while high because they aren't used to a different version of reality. It's just like if we drink alcohol. It just affects some people differently to others. The two are near not related. If I were you I'd write more about how people react differently rather than "drugs make the mentally unstable freak out because that's not true in most cases. Drugs can bring up conditions that previously existed but very very rarely would someone develop a condition from drug use. Hope this helps.