U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS
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Details

Stereochemistry ACHIRAL
Molecular Formula C12H17N2O4P
Molecular Weight 284.2481
Optical Activity NONE
Defined Stereocenters 0 / 0
E/Z Centers 0
Charge 0

SHOW SMILES / InChI
Structure of Psilocybin

SMILES

CN(C)CCC1=CNC2=C1C(OP(O)(O)=O)=CC=C2

InChI

InChIKey=QVDSEJDULKLHCG-UHFFFAOYSA-N
InChI=1S/C12H17N2O4P/c1-14(2)7-6-9-8-13-10-4-3-5-11(12(9)10)18-19(15,16)17/h3-5,8,13H,6-7H2,1-2H3,(H2,15,16,17)

HIDE SMILES / InChI
Psilocybin is a naturally occurring psychedelic prodrug compound produced by more than 200 species of mushrooms, collectively known as psilocybin mushrooms. Once ingested, psilocybin is rapidly metabolized to the psilocin, which then acts on serotonin receptors in the brain. Psilocybin was identified as the active hallucinogenic compound in magic mushrooms in 1959, but humans have used assorted psilocybin mushrooms in religious ceremonies since prehistoric times. In the 1960's psilocybin was marketed for use as a treatment for various psychoses, however, it was withdrawn from the market when the regulatory environment changed. Recently there has been as renewed interest in studying the medicinal uses of psilocybin for treatment of anxiety, depression, migraine headaches, addictions, and other neuropsychiatric conditions.

Approval Year

Targets

Targets

Primary TargetPharmacologyConditionPotency
Target ID: P28223
Gene ID: 3356.0
Gene Symbol: HTR2A
Target Organism: Homo sapiens (Human)
Target ID: Q64264
Gene ID: 15550.0
Gene Symbol: Htr1a
Target Organism: Mus musculus (Mouse)
49.0 nM [Ki]
Target ID: P35363
Gene ID: 15558.0
Gene Symbol: Htr2a
Target Organism: Mus musculus (Mouse)
25.0 nM [Ki]
Target ID: P34968
Gene ID: 15560.0
Gene Symbol: Htr2c
Target Organism: Mus musculus (Mouse)
10.0 nM [Ki]
Conditions

Conditions

ConditionModalityTargetsHighest PhaseProduct
Primary
Unknown

Approved Use

Unknown
Primary
Unknown

Approved Use

Unknown
Primary
Unknown

Approved Use

Unknown
Primary
Unknown

Approved Use

Unknown
Cmax

Cmax

ValueDoseCo-administeredAnalytePopulation
16 μg/L
0.3 mg/kg single, oral
dose: 0.3 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
PSILOCIN plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
26 μg/L
0.45 mg/kg single, oral
dose: 0.45 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
PSILOCIN plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
37.6 μg/L
0.6 mg/kg single, oral
dose: 0.6 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
PSILOCIN plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
AUC

AUC

ValueDoseCo-administeredAnalytePopulation
140 μg × h/L
0.3 mg/kg single, oral
dose: 0.3 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
PSILOCIN plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
213 μg × h/L
0.45 mg/kg single, oral
dose: 0.45 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
PSILOCIN plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
267 μg × h/L
0.6 mg/kg single, oral
dose: 0.6 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
PSILOCIN plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
T1/2

T1/2

ValueDoseCo-administeredAnalytePopulation
3 h
0.3 mg/kg single, oral
dose: 0.3 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
PSILOCIN plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
3 h
0.45 mg/kg single, oral
dose: 0.45 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
PSILOCIN plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
3 h
0.6 mg/kg single, oral
dose: 0.6 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
PSILOCIN plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
PubMed

PubMed

TitleDatePubMed
Effect of ring fluorination on the pharmacology of hallucinogenic tryptamines.
2000 Nov 30
Brain mechanisms of hallucinogens and entactogens.
2001 Dec
[Hallucinogenic mushrooms].
2005
Severe rhabdomyolysis, acute renal failure and posterior encephalopathy after 'magic mushroom' abuse.
2005 Dec
[Hallucinogenic fungi (Psylocibe). Part I. Characteristics, results of consumption, recognition].
2005 Jul-Sep
Investigation into the temporal stability of aqueous standard solutions of psilocin and psilocybin using high performance liquid chromatography.
2006 Apr-Jun
Psilocybin can occasion mystical-type experiences having substantial and sustained personal meaning and spiritual significance.
2006 Aug
The determination of psilocin and psilocybin in hallucinogenic mushrooms by HPLC utilizing a dual reagent acidic potassium permanganate and tris(2,2'-bipyridyl)ruthenium(II) chemiluminescence detection system.
2006 Jan
Psilocin identified in a DUID investigation.
2006 Jun
Response of cluster headache to psilocybin and LSD.
2006 Jun 27
Safety, tolerability, and efficacy of psilocybin in 9 patients with obsessive-compulsive disorder.
2006 Nov
Not imagining it. Research into hallucinogens cautiously resumes.
2006 Nov
[Chronic cluster headache: Response to psilocybin].
2006 Nov 1-15
Phylogenetic relationship of psychoactive fungi based on rRNA gene for a large subunit and their identification using the TaqMan assay (II).
2006 Nov 10
Reviving the study of hallucinogens.
2006 Oct
Application of ion mobility spectrometry in cases of forensic interest.
2006 Sep 12
[Concentration of selected microelements in blood serum of rats exposed to the action of psilocin and phenylethylamine].
2007
5-Year trends in use of hallucinogens and other adjunct drugs among UK dance drug users.
2007
Psilocybin links binocular rivalry switch rate to attention and subjective arousal levels in humans.
2007 Dec
[Automutilation after consumption of hallucinogenic mushrooms].
2007 Dec 29
Effects of psilocybin on time perception and temporal control of behaviour in humans.
2007 Jan
[Hallucinogenic fungi (psilocybe). Part II. Identification of Psilocybe semilanceata by PCR].
2007 Jul-Sep
[Prof. Günther Hole on his self-experiments. "What did I actually endure?"].
2007 Mar 15
Psilocybin-induced stimulus control in the rat.
2007 Oct
The effects of the preferential 5-HT2A agonist psilocybin on prepulse inhibition of startle in healthy human volunteers depend on interstimulus interval.
2007 Sep
Albert Hofmann, the father of LSD (1906-2008).
2008
Between prohibitions: patterns and meanings of magic mushroom use in the UK.
2008
Effects of varied doses of psilocybin on time interval reproduction in human subjects.
2008 Apr 11
Mystical-type experiences occasioned by psilocybin mediate the attribution of personal meaning and spiritual significance 14 months later.
2008 Aug
The structure of human serotonin 2c G-protein-coupled receptor bound to agonists and antagonists.
2008 Aug
Hallucinogen-like effects of N,N-dipropyltryptamine (DPT): possible mediation by serotonin 5-HT1A and 5-HT2A receptors in rodents.
2008 Jan
[Hallucinogen-induced psychological disorders].
2008 Jun
Unrecognized magic mushroom abuse in a 28-year-old man.
2008 Oct
Analysis of mushroom exposures in Texas requiring hospitalization, 2005-2006.
2009 Jun
Apical regional wall motion abnormalities reminiscent to Tako-Tsubo cardiomyopathy following consumption of psychoactive fungi.
2009 May 1
Return of a problem child.
2009 Oct
Availability of websites offering to sell psilocybin spores and psilocybin.
2009 Sep
Sensorimotor gating depends on polymorphisms of the serotonin-2A receptor and catechol-O-methyltransferase, but not on neuregulin-1 Arg38Gln genotype: a replication study.
2009 Sep 15
Micro-solid phase extraction coupled with high-performance liquid chromatography-tandem mass spectrometry for the determination of stimulants, hallucinogens, ketamine and phencyclidine in oral fluids.
2010 Aug 24
Psychometric evaluation of the altered states of consciousness rating scale (OAV).
2010 Aug 31
Hallucinogens as medicine.
2010 Dec
Forensic analysis of hallucinogenic mushrooms and khat (Catha edulis Forsk) using cation-exchange liquid chromatography.
2010 Feb 25
Comparative study of ATR and transflection IR spectroscopic techniques for the analysis of hallucinogenic mushrooms.
2010 Feb 25
Glucuronidation of psilocin and 4-hydroxyindole by the human UDP-glucuronosyltransferases.
2010 Mar
Timothy Leary, Richard Alpert (Ram Dass) and the changing definition of psilocybin.
2010 May
Turn on, tune in, but don't drop out: The impact of neo-liberalism on magic mushroom users' (in)ability to imagine collectivist social worlds.
2010 Nov
Differential contributions of serotonin receptors to the behavioral effects of indoleamine hallucinogens in mice.
2011 Nov
Fungal hallucinogens psilocin, ibotenic acid, and muscimol: analytical methods and biologic activities.
2013 Aug
Effect of psilocin on extracellular dopamine and serotonin levels in the mesoaccumbens and mesocortical pathway in awake rats.
2015
The hallucinogenic world of tryptamines: an updated review.
2015 Aug
Patents

Sample Use Guides

Rats were administered 5 and 10 mg/kg of Psilocin as an intraperitoneal injection. Following the dosing protocol, extracellular dopamine levels were increased in the nucleus accumbens. Psilocin did not affect the extracellular 5-HT level in the nucleus accumbens. However, systemic administration of 10 mg/kg of psilocin significantly increased extracellular 5-HT levels in the ventral tegmental area, but decreased dopamine in this area. Behaviorally, psilocin significantly increased the number of head twitches.
Route of Administration: Intraperitoneal
In Vitro Use Guide
Unknown
Name Type Language
Psilocybine
HSDB   INN   MART.   WHO-DD  
INN  
Preferred Name English
Psilocybin
MI  
USAN  
Official Name English
CY39
Code English
1H-Indol-4-ol, 3-[2-(dimethylamino)ethyl]-, 4-(dihydrogen phosphate)
Systematic Name English
TEONANACATL
Common Name English
COMP360
Code English
PSILOCYBIN [MI]
Common Name English
Psilocybine [WHO-DD]
Common Name English
psilocybine [INN]
Common Name English
PSILOCYBIN [USAN]
Common Name English
PSILOCYBINE [HSDB]
Common Name English
PSILOCYBINE [MART.]
Common Name English
3-[2-(dimethylamino)ethyl]-1H-indol-4-yl dihydrogen phosphate
Systematic Name English
CY-39
Code English
INDOCYBIN
Common Name English
COMP-360
Code English
Classification Tree Code System Code
NCI_THESAURUS C47794
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
NCI_THESAURUS C221
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
DEA NO. 7437
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
FDA ORPHAN DRUG 843421
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
Code System Code Type Description
MESH
D011562
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
ECHA (EC/EINECS)
208-294-4
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
WIKIPEDIA
PSILOCYBIN
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
WIKIPEDIA
Psilocybin_mushroom
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
GENERIC (FAMILY)
EVMPD
SUB10158MIG
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
NCI_THESAURUS
C62529
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
CHEBI
139072
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
USAN
LM-236
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
ChEMBL
CHEMBL194378
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
DRUG BANK
DB11664
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
CHEBI
8614
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
FDA UNII
2RV7212BP0
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
HSDB
7365
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
EPA CompTox
DTXSID0048898
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
MERCK INDEX
m9305
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY Merck Index
INN
1218
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
CAS
520-52-5
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
PUBCHEM
10624
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY
SMS_ID
100000080863
Created by admin on Wed Apr 02 08:28:43 GMT 2025 , Edited by admin on Wed Apr 02 08:28:43 GMT 2025
PRIMARY