Gaboxadol Stats & Data
Pharmacology
DrugBankDescription
Gaboxadol also known as 4,5,6,7-tetrahydroisoxazolo(5,4-c)pyridin-3-ol (THIP) is an experimental sleep aid drug developed by Lundbeck and Merck, who reported increased deep sleep without the reinforcing effects of benzodiazepines. Development of Gaboxadol was stopped in March 2007 after concerns regarding safety and efficacy. It acts on the GABA system, but in a seemingly different way from benzodiazepines and other sedatives.
Indication
Investigated for use/treatment in sleep disorders and insomnia.
Effect Profile
Curated + 2 ReportsStrong cognitive impairment with mild anxiolysis, sedation, and euphoria
Tolerance & Pharmacokinetics
drugs.wikiTolerance Decay
Evidence on tolerance kinetics in humans is sparse. Rapid tolerance is expected with daily use by analogy to other GABAergic sedatives; some animal data suggest distinct receptor populations (extrasynaptic δ vs. synaptic γ2) which may alter cross-tolerance magnitude relative to benzodiazepines.
Cross-Tolerances
Experience Report Analysis
ErowidDemographics
Gender Distribution
Age Distribution
Reports Over Time
Harm Reduction
drugs.wikiGaboxadol is a direct-acting orthosteric GABA-A agonist that preferentially engages extrasynaptic δ-subunit–containing receptors mediating tonic inhibition; this explains deep sedation with less 'benzo-like' disinhibition and has implications for combinations and reversal strategies. Because it does not act at the benzodiazepine site, flumazenil is unlikely to reverse isolated gaboxadol intoxication; management is supportive with airway monitoring, especially if other depressants were involved. High or repeated doses have been associated anecdotally and in development reports with delirium, hallucinations, and amnesia; therefore, avoid pushing beyond the common range and do not stack redoses in one night. Combination with opioids, alcohol, GHB/GBL, benzodiazepines or Z-drugs substantially increases risk for respiratory depression, loss of consciousness, and aspiration; treat these combinations as high-risk and keep doses markedly lower if abstinence from mixing is not maintained. A structural study confirms binding at α4β3δ extrasynaptic GABA-A receptors, providing mechanistic support for potent slow-wave sleep promotion and pronounced motor incoordination; practice 'safe sleep' (no baths, hazards, or tasks) and plan not to drive until fully recovered. User reports indicate variability in time to peak and next-morning grogginess; if experimenting, take the first dose on a quiet night with supervision available and no next-day obligations. A harm-reduction lab warning has identified mis-sold material contaminated with ibotenic acid (an excitotoxic Amanita alkaloid); obtain from trusted sources, consider analytical testing where available, and do not consume products of uncertain identity. Start with an allergy test (~1 mg), then space trials by several days to gauge sensitivity and tolerance build-up; tolerance to GABAergic sedatives often develops quickly and resolves slowly. As with other strong sedatives, people with sleep apnea, chronic lung disease, or unstable cardiovascular disease are at higher risk from nocturnal hypoventilation; these groups should avoid use.
References
Drugs.wiki References
- DrugBank: Gaboxadol (DB06554)
- PubChem: Gaboxadol (CID 3448)
- NCBI MMDB/PDB 7QNC: α4β3δ GABA-A receptor in complex with THIP (gaboxadol)
- Bluelight discussion: Gaboxadol (development notes and user reports)
- Reddit: Gaboxacol experience – slept 16 hours (user report on dosing and after-effects)
- Reddit: Gaboxadol Trip Report (user report noting impairment window and dream vividness)
- TripSit: Drug Combination Chart (general depressant-combination cautions)
- Bluelight: The GABA(A) Receptor Complex and Benzodiazepines (mechanistic context for sites and synergy)
- Drug Users Bible: Harm Reduction & Safety (general principles including allergy-tests)