Papers in the psychiatric literature describing “bad trips,” or adverse psychological reactions to psychedelics, also multiplied, but are similarly limited. In order to address these concerns in my own study, I read every paper describing such negative effects and published the results. It was clear that rates of psychiatric complications were extraordinarily low in controlled research settings, for both normal volunteers and psychiatric patients. However, when psychiatrically ill or unstable individuals took impure or unknown psychedelics, combined with alcohol and other drugs, in an
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