GVL
Aliases: Tranquili-g, 4-pentanolide, 4-methylbutyrolactone, Gamma-methyl-gamma-butyrolactone
Categories
Summary
GVL has a density of approximately 1.05 g/mL, meaning 1 mL contains roughly 1050 mg of neat GVL. Animal studies indicate GBL is 5-7 times more potent than GVL, with human anecdotal reports aligning with typical single doses of 3-7 mL and binge totals exceeding 40 mL. Subjectively less euphoric but significantly longer-acting than GBL/GHB, with effects that plateau rather than peak sharply. This leads to misjudgment of redose timing, sometimes called 'slow-J'. Delayed convulsive overdoses have been reported 8-9 hours after a 3 mL redose combined with alcohol.
Dose Information
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | After Effects |
|---|---|---|---|---|---|
| Oral | 20-40 min | 30-60 min | 1-3 hrs | 2-4 hrs | 4-8 hrs |
Tolerance
Build-up
develops over 1–4 weeks of regular use
Reset
days to weeks depending on duration of use
Effects
Positive
- Physical euphoria
- Muscle relaxation
- Anxiolysis
- Stimulation
- Analgesia
Negative
- Nystagmus
- Nausea
- Difficulty speaking
- Sedation
- Dystaxia
Positive
- Reduced anxiety
- Cognitive euphoria
- Empathy, affection, and sociability enhancement
- Anxiety suppression
- Relaxation
Negative
- Motor control loss
- Memory suppression
- Amnesia
- Compulsive redosing
- Dizziness
Positive
- Increased libido
- Tactile Enhancement
- Increased Music Appreciation
- Pattern Recognition Enhancement
Negative
- Disinhibition
- Double vision
- Appetite suppression
- Dulled perception
- Increased sex drive
- Auditory hallucination