Chemical compound
Nomenclature & Identifiers
Systematic name 4-Hydroxy-N,N-dimethyl-tryptamine
Other names 4-hydroxy-dimethyltryptamine, 4-HO-DMT
CAS number 520-53-6
ChemSpider ID 4807
PubChem ID 4980
Formula C12H16N2O
Molar mass 204.27 g mol-1
Appearance Oxidises to purple in air.
Melting point 173–176 °C, 343–349 °F
Related compounds
Related compounds Melatonin, O-acetylpsilocin, Psilocybin, Serotonin, Tryptophan.

Psilocin (4-hydroxy-methyltryptamine, 4-HO-DMT) is an alkaloid found in the Psilocybe genus of mushrooms. In humans it acts as a psychedelic drug through its structural similarity to the neurotransmitter serotonin. As a result it is thought to be able to mimic serotonin at the 5-HT2A receptors in the brain, where it acts as a partial agonist, producing halluinogenic effects.

Pill-symbol Drug properties
Drug class Hallucinogen
Street names Magic mushrooms, shrooms.
Common formulations Alkaloid naturally occurs in Psilocybe mushroom genus, psilocin hydrochloride.
Bioavailability 70%
Metabolism Hepatic
Excretion Kidneys
Prodrugs Psliocybin
Other considerations
Routes of administration Routes of administration
Typical dose Typical dosage
Dependency potential Low.
Pregnancy category C
Legal status Class A (UK), Schedule I (US).