1,4-Butanediol Facts
Depressant;
Description
1,4-Butanediol (butane-1,4-diol) is a synthetic depressant of the aliphatic diol class. It is a prodrug of GHB, meaning it is chemically inert until the body converts it. This conversion produces GHB, which activates GABA receptors in the brain[1][2] and produces the sedation and euphoria characteristic of CNS depressants.
Subjective effects include euphoria, warmth, disinhibition, enhanced sociability, and sedation. The experience resembles a cleaner, more euphoric version of alcohol intoxication — warm and loosening at first, then shifting abruptly into heavy sedation as the dose rises.
1,4-BD produces rapid physical dependence, and the margin between a euphoric and a fatal dose is one of the narrowest among recreational depressants.[3] A genetic variation in the converting enzyme can make the same dose up to four times more potent in some people than others,[4] making individual responses unpredictable.
Dose and durationby route · individual sensitivity varies
Starts in 20 – 60 minLasts 3 – 5 hoursAfter-effects 2 – 4 hours
Body and dependence
- Acute toxicity
- High
- Chronic toxicity
- Moderate
- Physical dependence
- High
- Psychological dependence
- High
- Withdrawal
- Life-threatening · fatal · medical supervision
- Compulsive redosing
- High
Tolerance
- Builds
- Moderate
- Fully resets after
- 10.5 days
- Carries over to
- baclofen
Effectslikely at a common dose
- Perception
- none likely · 7 possible, including Spatial disorientation, Vestibular distortion, Double vision
- Body
- Body high;
Motor control impairment; Muscle relaxation; Physical fatigue; Sedation; +23 possible, including Dizziness, Insomnia, Nausea - Thinking
- Cognitive impairment;
+17 possible, including Analysis suppression, Compulsive redosing urge, Confusion - Feeling
- Anxiety suppression;
Euphoria; +8 possible, including Emotional lability, Anhedonia, Depression - Self
- Disinhibition;
+11 possible, including Craving, Communication suppression, Depersonalization - Time
- none likely · 2 possible, including Temporal disorientation
Who shouldn't take it
Combinations60 recorded
Seek help immediately if
- Extreme drowsiness — can't stay awake or be roused
- Confusion, slurred speech, severe loss of coordination
- Slow, shallow, or irregular breathing
- Unconsciousness / unresponsive; limp, floppy body
- Blue lips or fingertips
- Vomiting while sedated (choking / aspiration risk)
- Cold, clammy skin; weak pulse
What to do
- Try to wake them — shout, firm sternal rub
- If unresponsive or breathing is impaired, call emergency services
- Place them in the recovery position — critical, they can choke on vomit
- Monitor breathing continuously; be ready to give rescue breaths / CPR
- Never leave them alone to "sleep it off"
- Do not give other drugs, stimulants, or more depressants
Most depressant overdoses resolve with airway protection, breathing support, and monitoring. The danger is respiratory depression and choking on vomit — sharply worse when combined with opioids or alcohol. GHB/GBL overdoses often involve sudden deep unconsciousness and may self-resolve, but airway protection is essential.
988 Suicide & Crisis LifelineFireside Project: 62-FIRESIDE
References
- [1]^Mathivet P, Bernasconi R, De Barry J, et al. (1997) Binding characteristics of gamma-hydroxybutyric acid as a weak but selective GABAB receptor agonist — European Journal of Pharmacology PMID:9083788
- [2]^Lingenhoehl K, Brom R, Heid J, et al. (1999) Gamma-hydroxybutyrate is a weak agonist at recombinant GABA(B) receptors — Neuropharmacology PMID:10587082
- [3]^Busardò FP, Jones AW (2015) GHB pharmacology and toxicology: acute intoxication, concentrations in blood and urine in forensic cases and treatment of the withdrawal syndrome — Current Neuropharmacology doi:10.2174/1570159x13666141210215423
- [4]^Thai D, Dyer JE, Jacob P, Haller CA (2007) Clinical pharmacology of 1,4-butanediol and gamma-hydroxybutyrate after oral 1,4-butanediol administration to healthy volunteers — Clinical Pharmacology and Therapeutics PMID:17192771