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Depressant

GBL

also: G · Liquid · Gamma · Blue Nitro · BDO

review pending

Content is undergoing medical and legal review. Changes possible.

GHB prodrug (gamma-butyrolactone). Converted to GHB in the body. Faster onset and more potent per ml than GHB. Same risks apply — extremely narrow safety margin. Industrial solvent that is caustic undiluted.

Onset

10 min

Peak

40 min

Duration

1 h 45 min

Half-life

25 min

Routes

oral

Dosing

Common dose: 0.3 ml

Strong dose: 1.2 ml

⚠️ This substance has a very narrow therapeutic margin. Never use without precise dosing (pipette, syringe).

Risks

  • ·
    All GHB risks apply — respiratory depression, G-lock, death consensus
  • ·
    NEVER mix with alcohol or other depressants consensus
  • ·
    More potent per ml than GHB — easier to overdose consensus
  • ·
    Caustic to mouth/throat if undiluted consensus
  • ·
    Rapid physical dependence consensus
  • ·
    Withdrawal can be life-threatening consensus

Safer Use

  • ·
    Always dilute before consuming consensus
  • ·
    Use a pipette or syringe — precision is critical consensus
  • ·
    MINIMUM 2 hours between doses — set a timer consensus
  • ·
    NO alcohol, NO benzos, NO opioids consensus
  • ·
    GBL is roughly 1.5× more potent than GHB per ml consensus
  • ·
    Always have a sober supervisor consensus
  • ·
    Start with far less than you think you need consensus

Drug Checking

GBL is a prodrug converted to GHB in the body. It is roughly 1.5× more potent than GHB per ml. Purity varies. Drug checking services can test concentration. - saferparty.ch — Swiss drug checking - drugsdata.org — Lab results database