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  • Title: 2,5-dimethoxy-4-methyl-amphetamine (STP): a new hallucinogenic drug.
    Author: Snyder SH, Faillace L, Hollister L.
    Journal: Science; 1967 Nov 03; 158(3801):669-70. PubMed ID: 4860952.
    Abstract:
    We have assessed the effects in normal control volunteers of 2,5-dimethoxy-4-methyl-amphetamine, the chemical present in the hallucinogenic drug STP, in two independent trials. In low doses, this compound produces a mild euphoria. Doses greater than 3 milligrams may cause pronounced hallucinogenic effects lasting about 8 hours and similar to those produced by hallucinogenic doses of lysergic acid diethylamide, mescaline, and psilocybin. 2,5-Dimethoxy-4-methyl-amphetamine, which is chemically related to mescaline and amphetamine, is about 100 times more potent as a hallucinogen than mescaline and only one-thirtieth as potent as lysergic acid diethylamide. Its psychological effects are not accentuated by chlorpromazine.
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