Question
Have you ever heard of meditation or astral projection bringing on permanent hallucinations or atypical schizophrenia?
Answer
John , Thank you for your question.
I do not know what you mean by "astral projection", but there are some reports of mental illness among meditators. You may be able to find references for this on the Web. I believe that the incidence is comparable to that in the general population; it is not clear that the meditation was the causative factor in these cases.
Personally, I have known hundreds of practitioners of Transcendental Meditation (and have taught about one hundred) and know of no case such as you describe. TM helps make a person relaxed, happy, and productive.
David Spector