Pyr-T

Pyr-T ("N","N"-tetramethylenetryptamine) is a lesser-known, possible psychedelic drug. Pyr-T was first characterized by S. Mitzal. Toxicity testing was later performed by Hunt and Brimblecombe, and although a lethal dosage was found in rats, a value is not given. In the book "TiHKAL" ("Tryptamines I Have Known and Loved"), neither the dosage nor the duration are reported.
Pyr-T produces few to no effects in humans, but some behavioral changes were observed in animal tests. Very little data exists about the pharmacological properties, metabolism, and toxicity of pyr-T.