DrugsPRO / Library / GVL

Library

GVL

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.

GVL molecular structure
GVL molecular structure diagram from the DrugsPRO substance library.

Also known as: Tranquili-g, 4-pentanolide, 4-methylbutyrolactone, Gamma-methyl-gamma-butyrolactone, gamma-Valerolactone

Classification

  • Chemical: GHB analogue
  • Psychoactive: Depressant
  • Tag: GABA analogue
  • Tag: GABAergic
  • Tag: Lactone
  • Tag: Muscle Relaxant
  • Tag: Research-Chemical
  • Tag: Sedative

Effects

  • Physical Euphoria
  • Muscle Relaxation
  • Anxiolysis
  • Difficulty Speaking
  • Nystagmus
  • Nausea
  • Motor Control Loss
  • Reduced Anxiety
  • Empathy Love And Sociability Enhancement
  • Information Processing Suppression
  • Thought Deceleration
  • Amnesia
  • Disinhibition
  • Double Vision
  • Appetite Suppression
  • Dulled Perception
  • Dehydration
  • Increased Sex Drive

Routes of Administration

Oral

Dosage

  • Threshold: 1 mL
  • Light: 1-3 mL
  • Common: 3-7 mL
  • Strong: 7-12 mL
  • Heavy: 12 mL

Duration

  • Onset: 0.33-0.67 h
  • Comeup: 0.5-1 h
  • Peak: 1-3 h
  • Offset: 2-4 h
  • After Effects: 4-8 h

Harm Reduction

Check interactions before mixing substances, pay attention to dose spacing and hydration, and treat all dosage guidance as approximate rather than guaranteed safe.

Sources

Substance data is aggregated from the following public harm-reduction and reference sources.

Links

This static page is intended as a readable non-JS and prerender-friendly library export.

Interactive library page More substances Sitemap index

Get the full DrugsPRO experience

Open the interactive DrugsPRO app for search, saved items, interactions, and deeper harm reduction tools.

Get the PRO test kit. The simple, quick and reliable drug checking test kit. Visit https://protestkit.eu

Get it on Google Play Download on the App Store

GVL - DrugsPRO průvodce látkou

GVL: 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

Related pages