It's been a long day, I've had sinus problems all day, and been somewhat zonked from a combination of not not feeling good and taking sinus medicine. Around 11:00 I had taken a Tavist-D which was making me feel pretty drained. 2:00 Mix 5 ml of GVL solution into a shot glass of water. I have never tried GHB or GVL.
GVL
Limited data
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 1 source
- duration data present
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 1 source
- duration data present
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
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
| ROA | Threshold |
|---|---|
| Oral | 1mL |
Only a threshold dose is documented for this substance — the smallest amount with a noticeable effect. There is no published light/common/strong ladder to show above it.
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Oral | 20-40 min | 30-60 min | 1-3 hrs | 2-4 hrs | 3.83-8.67 hrs |
Add to PsychonautWiki Journal
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Name
GVL
Unit
ml
Description
GVL Source: SubstanceSearch (substancesearch.com) Oral dose (ml): threshold 1mL Oral duration: onset 20-40m · come-up 0.5-1h · peak 1-3h · offset 2-4h · total 3.83-8.67h · after-effects 4-8h Note: ranges are harm-reduction guidance, not a prescription. Start low, go slow, and test your substances.
The app keeps custom substances simple, so the full dose ranges live in the description text above. Ranges are harm-reduction guidance, not a prescription.
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
Acute tolerance: develops within a single session — the reset numbers above apply after sustained heavy use, not after one binge. Within-session tachyphylaxis usually resets largely overnight.
Effects
Aggregated from 6 Erowid experience reports
Positive Effects 2
Sedation
50.0%
70%
Anxiety Suppression
50.0%
70%
Adverse Effects 0
Community Trip Reports
Anecdotal first-person accounts from Reddit, Erowid, and Bluelight. Click a source to expand. Reports are harm-reduction context, not medical guidance. Tags summarise each author's own verdict — how reports are classified.
Erowid 3 reports 2 neutral 1 cautionary visit
I recently ordered several bottles of Tranquili-G, much to my disappointment. I started with the suggested dose of 1 teaspoon (1/6 ounce) with absolutely no effect after over an hour. I then took successively larger doses with no effect.
Well, a couple of days ago I posted a message to alt.drugs.ghb asking about Tranquilli-G. It arrived today; I took about 2.5mL after working from 5:30a.m til' 2:00p.m. Before I took it I was feeling agitated achy, and tired. It took about 20 min.
Bluelight 1 thread 1 neutral visit
It's been a long day, I've had sinus problems all day, and been somewhat zonked from a combination of not not feeling good and taking sinus medicine. Around 11:00 I had taken a Tavist-D which was making me feel pretty drained. 2:00 Mix 5 ml of GVL solution into a shot glass of water. I have never tried GHB or GVL.
GVL's nerd page
Pharmacology, chemical data, effect profiles, and more
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Helpful Links
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