Skip to content
100% Lab-Tested
Free Shipping on Orders $50+
Card Payments Accepted

Muscimol — Compound Profile

Muscimol

2D structure of Muscimol (C4H6N2O2) — source: PubChem CID 4266
2D structure of Muscimol (C4H6N2O2) — source: PubChem CID 4266

Chemistry

  • CID: 4266 · PubChem
  • Formula: C4H6N2O2
  • Molecular weight: 114.1 g/mol
  • IUPAC: 5-(aminomethyl)-1,2-oxazol-3-one
  • CAS: 2763-96-4

Family & pharmacology

Family: Isoxazole (not an indole alkaloid)

Pharmacological class: GABA-A receptor full agonist — binds selectively and potently at the GABA-binding site (orthosteric site) of GABA-A receptors, producing sedative, hypnotic, anxiolytic, and at higher doses dissociative/psychedelic effects. Unlike benzodiazepines (which act allosterically), muscimol is a direct agonist and therefore active even in the absence of endogenous GABA. It does not act on serotonergic (5-HT₂A) or dopaminergic pathways.

Natural source: Muscimol is the primary psychoactive constituent of Amanita muscaria (fly agaric) and related Amanita species including A. pantherina and A. regalis. It is formed in vivo and during drying/cooking by decarboxylation of ibotenic acid, a structural precursor also present in fresh fruiting bodies. The ratio of ibotenic acid to muscimol is highly variable and depends on drying temperature and time.

Historical context

Muscimol was first isolated in 1964 by Swiss chemist Conrad Hans Eugster and colleagues at the University of Zurich, who also elucidated its structure and confirmed its GABAergic mechanism. Interest in Amanita muscaria as a psychoactive agent long predates isolation: ethnomycologist R. Gordon Wasson proposed in 1968 (Soma: Divine Mushroom of Immortality) that fly agaric was the identity of Soma, the sacred beverage described in the Rigveda — a hypothesis that remains debated among ethnobotanists and classicists.

Siberian and Eurasian accounts of fly agaric use — particularly among Koryak, Chukchi, and Evenki reindeer herders — were documented by European travellers from the 18th century onward. The anthropologist Jochen Gartz and others have argued that the reindeer–Amanita relationship (reindeer actively seeking fly agaric) has contributed to shamanic iconography including the Santa Claus myth.

Traditional use

  • Siberian shamanic ritual: fly agaric dried and consumed by shamans to induce visionary states; urine recycling (muscimol is excreted largely unchanged) was documented in several ethnohistorical sources
  • Reindeer herding communities in northeastern Siberia consumed fly agaric to reduce fatigue and pain on long journeys
  • Not documented in significant traditional use contexts in Central or Western Europe, despite widespread occurrence of A. muscaria

Modern research context

Contemporary research interest in muscimol centres on its GABA-A agonism as a tool compound to map receptor subunit specificity, and on potential therapeutic applications in anxiety and epilepsy. Muscimol's selectivity profile differs from benzodiazepines and barbiturates, and unlike many GABA-A modulators it does not require a specific subunit combination, making it a useful research probe.

Muscimol shows anticonvulsant effects in animal models and has been investigated for neuroprotective properties in ischemia models. It is important to note that muscimol has no serotonergic activity — its experiential profile (sedation, dreamlike states, body effects) differs substantially from classical psychedelics (psilocybin, LSD). Clinical research in humans remains limited; most data derive from animal pharmacology.

Safety

Muscimol is potent at low doses (effective dose range reported in the single-digit milligram range in experienced users). Fresh Amanita muscaria fruiting bodies contain predominantly ibotenic acid, which must be converted to muscimol by decarboxylation (typically via controlled drying at 50–70 °C). Ibotenic acid is a neuroexcitatory NMDA receptor agonist that contributes to nausea and dysphoria. Improperly prepared material therefore carries higher risk than preparations where decarboxylation is complete.

Dose–response is steep and highly variable between specimens. Adverse effects include nausea, vomiting, excessive salivation, confusion, and ataxia. There is no specific antidote; supportive care is standard. Combining muscimol with alcohol or other CNS depressants significantly increases the risk of respiratory depression. Not appropriate for unsupervised use.

Legal status in Germany

As of 2026, muscimol is not scheduled in the German Narcotics Act (BtMG, Anlagen I–III) and is not listed in the New Psychoactive Substances Act (NpSG). Amanita muscaria mushrooms and muscimol-containing preparations are legal to possess, purchase, and sell in Germany. There is no medicinal-use restriction comparable to that affecting ibogaine or psilocybin. Amanita muscaria extracts and dried fruiting bodies are openly traded as botanical specimens.

Related content