GVL
Aliases: Tranquili-g, 4-pentanolide, 4-methylbutyrolactone, Gamma-methyl-gamma-butyrolactone
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.
Dose Information
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset |
|---|---|---|---|---|
| Oral | 20-40 min | 30-60 min | 1-3 hrs | 2-4 hrs |
Tolerance
Build-up
develops over 1–4 weeks of regular use
Reset
days to weeks depending on duration of use
Tolerance Decay
Full tolerance
3d
Half tolerance
8d
Baseline
~14d
Effects
Aggregated from 6 Erowid experience reports
Positive Effects 2
Sedation
50.0%
70%
Anxiety Suppression
50.0%
70%
Adverse Effects 0
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