Methylcyclopropyltryptamine (McPT), also known as N-methyl-N-cyclopropyltryptamine, is a psychedelic drug of the tryptamine family related to dimethyltryptamine (DMT). It was encountered as a novel designer drug in the United Kingdom in August 2015. Known derivatives of McPT include 4-HO-McPT and 4-AcO-McPT.