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1,3-Butanediol is an alcohol-like compound the body metabolizes into beta-hydroxybutyrate, a ketone body and, more prominently, into a beta-hydroxybutyrate ketone, giving it a slow, alcohol-like depressant effect. It's used industrially and as a food-grade solvent, and it's sometimes taken in place of GHB-family drugs. Its slow onset makes dose stacking and overshoot a serious risk.
- Alcohol-like relaxation
- Longer, gentler course than GHB
- Mild euphoria
- Nausea
- Sedation and respiratory depression at high doses
- Dangerous with alcohol
Mechanism
1,3-Butanediol is metabolized in the liver, largely by the same alcohol dehydrogenase pathway that handles ethanol, into beta-hydroxybutyrate and related compounds. Its central depressant effects are alcohol-like and are thought to arise partly through downstream activity and, by some accounts, a minor conversion contributing to GHB-type effects; the mechanism is less clean than for GBL. Because metabolism is slow and rate-limited by the same enzymes as alcohol, effects come on gradually and unpredictably.
receptor fingerprint
system (via metabolites)Indirect depressant
Safetyrisks and cautions, not medical advice
The delayed, alcohol-like onset tempts people to redose before the first amount peaks, which can lead to a heavy overshoot with sedation, nausea, and respiratory depression. It competes with alcohol for the same metabolizing enzyme, so combining the two prolongs and intensifies both and is dangerous. As with the GHB family, mixing with other depressants can be fatal, and dependence is possible. Not medical advice.
Subjective profileweighing the evidence above
Not worth it. The slow, unpredictable onset is exactly what gets people to redose before the first amount peaks, it competes with alcohol for the same enzyme so mixing the two is genuinely dangerous, and depressant combinations in this family can be fatal.
Resources
This entry is here for reference.
Research
1 listed here; entry last updated August 2026
Reviews
My notesprivate to this device
FAQ
Is 1,3-butanediol the same as GHB?
No. It's a separate compound with a slower, more alcohol-like effect; it's metabolized mainly to a ketone body, and its GHB-type effects are weaker and less direct than GBL's.
Why is redosing risky?
The onset is slow, so people often take more before the first dose peaks, leading to a delayed, heavier-than-intended effect.
Can it be combined with alcohol?
No. It shares alcohol's metabolizing enzyme, so combining them prolongs and deepens intoxication dangerously.
Adverse effects
- Nausea
- Sedation and respiratory depression at high doses
- Dangerous with alcohol
Notes and cautions
- Delayed onset encourages overshoot