Chemical and physical data
Formula C13H18N2
Molar mass 202.30 g/mol

α,N,N-Trimethyltryptamine (α,N,N-TMT, α-TMT, ATMT) is a psychoactive drug of the tryptamine chemical class which acts as a psychedelic hallucinogen. It is similar in structure to the other psychedelics of the tryptamine class such as dimethyltryptamine (DMT) and α-methyltryptamine (α-MT).

α-TMT has been animal tested in comparison with α-MT, and was found to produce similar effects to α-MT but with only around half the potency.[1] Anecdotal reports from human users suggest that it produces psychedelic effects similar to those of other tryptamine derivatives when taken orally at a dose of around 80–120 mg, however it does not appear to have been widely sold or used, and its safety profile has not been studied.

See also


  1. Kalir A, Szara S. Synthesis and pharmacological activity of alkylated tryptamines. Journal of Medicinal Chemistry. 1966 May;9(3):341-4.

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