Methylpropyltryptamine (MPT), also known as N-methyl-N-propyltryptamine, is a psychedelic drug of the tryptamine family. It is a homologue of methylethyltryptamine (MET).
Use and effects In his book TiHKAL (Tryptamines I Have Known and Loved), Alexander Shulgin described MPT's effects as being unknown and its dose as being greater than 50mg orally.
Interactions
Chemistry Detection An analytical method for MPT's detection has been reported.
Crystal structure In 2019, Chadeayne et al. published the crystal structure of MPT. The authors describe the structure as "...a single molecule in the asymmetric unit, with an indole group that demonstrates a mean deviation from planarity of 0.015 A°."
Analogues Analogues of MPT include 4-HO-MPT, 5-MeO-MPT, methylethyltryptamine (MET), ethylpropyltryptamine (EPT), ethylisopropyltryptamine (EiPT), and dipropyltryptamine (DPT), among others.
Society and culture Legal status Canada MPT is not a controlled substance in Canada as of 2025.
United States MPT is not an explicitly controlled substance in the United States. However, it is an isomer of diethyltryptamine (DET), which is a schedule I controlled substance in this country, and so may be considered a controlled substance in the United States similarly.
See also Substituted tryptamine
References
External links MPT - Isomer Design MPT - PsychonautWiki The Big & Dandy MPT Thread - Bluelight