1,3-Butanediol Facts
Depressant;
Description
1,3-Butanediol (butane-1,3-diol) is a synthetic depressant of the aliphatic diol class. The liver converts it into β-hydroxybutyrate, a natural ketone body, which drives its depressant effects.[1]
Subjective effects include lowered inhibitions, reduced anxiety, euphoria, dizziness, and sedation. The experience closely resembles ethanol — relaxation and social ease — but without alcohol's stimulatory early phase and compressed into roughly half its duration.[2][3]
Animal studies show chronic use produces physical dependence and alcohol-like withdrawal;[2] acute toxicity is roughly 2.5 times lower than ethanol in animal models.[4] The compound lowers blood sugar — a meaningful added risk for people with diabetes or on glucose-lowering medications.[5]
Dose and durationby route · individual sensitivity varies
Starts in 20 – 40 minLasts 2 – 4 hoursAfter-effects 1 – 3 hours
Body and dependence
- Acute toxicity
- Low
- Chronic toxicity
- Moderate
- Physical dependence
- Moderate
- Psychological dependence
- Low
- Withdrawal
- Moderate · medical supervision
- Compulsive redosing
- Low
Tolerance
- Builds
- Moderate
- Fully resets after
- Not recorded
- Carries over to
- ethanol
Effectslikely at a common dose
- Perception
- none likely · 8 possible, including Spatial disorientation, Vestibular distortion, Double vision
- Body
- Motor control impairment;
Sedation; +19 possible, including Dizziness, Nystagmus (eye wobbles), Dehydration sensation - Thinking
- Cognitive impairment;
+17 possible, including Decision impairment, Information processing suppression, Analysis suppression - Feeling
- none likely · 5 possible, including Emotional lability
- Self
- none likely · 6 possible, including Craving
- Time
- none likely · 2 possible, including Temporal disorientation
- Awareness
- none likely · 1 possible
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]^Frye GD, McCown TJ, Breese GR (1983) Characterization of susceptibility to audiogenic seizures in ethanol-dependent rats after microinjection of GABA agonists — The Journal of Pharmacology and Experimental Therapeutics PMID:6317842
- [2]^abFrye GD, Chapin RE, Vogel RA, Mailman RB, Kilts CD, Mueller RA, Breese GR (1981) Effects of acute and chronic 1,3-butanediol treatment on central nervous system function: a comparison with ethanol — The Journal of Pharmacology and Experimental Therapeutics PMID:7193248
- [3]
- [4]^McCarthy CG, Waigi EW, Singh G, Castaneda TR, Mell B, Chakraborty S, Wenceslau CF, Joe B (2021) Physiologic, Metabolic, and Toxicologic Profile of 1,3-Butanediol — The Journal of Pharmacology and Experimental Therapeutics doi:10.1124/jpet.121.000796
- [5]^Tobin RB, Mehlman MA, Kies C, Fox HM, Soeldner JS (1975) Nutritional and metabolic studies in humans with 1,3-butanediol — Federation Proceedings PMID:1183620