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Meditation is a popular method of relaxation and dealing with everyday stress. Meditative techniques have been used in the management of a number of psychiatric and physical illnesses. The risk of serious mental illness being precipitated by meditation is less well recognized however. This paper reports a case in which two separate manic episodes arose after meditation using techniques from two different traditions (yoga and zen). Other cases of psychotic illness precipitated by meditation and mystical speculation reported in the literature are discussed.
Graeme Yorston (2001) studied this question.