Counterexample: I have a friend who was a very happy person and started taking ecstasy in early 2000s. At one of the parties he saw a young colleague die just n

Counterexample: I have a friend who was a very happy person and started taking ecstasy in early 2000s. At one of the parties he saw a young colleague die just next to him. Of course everybody interpreted it as an unfortunate coincidence ("if you're unlucky, you can die of aspirin, too"). Then, one day, he went to see his dentist who asked him if he wants to take nitrous oxide. My friend agreed but that day something strange started happening to him. When he was telling me it seemed like serious paranoia. He lost his job, he was seeing things that weren't there, day and night. It lasted more than two years and doctors weren't able to help him. He is more or less normal now but won't even touch anything intoxicating, not even alcohol. Later I saw some articles about that and it doesn't seem so uncommon: https://pubmed.ncbi.nlm.nih.gov/1684523/ https://pubmed.ncbi.nlm.nih.gov/1684523/ https://www.cambridge.org/core/journals/the-british-journal-of-psychiatry/article/abs/ecstasy-psychosis-and-flashbacks/8F8C0DEDD6BC1739D79A166B81E7E1A3 https://www.cambridge.org/core/journals/the-british-journal-...