
Gamma-Hydroxybutyric acid (GHB) and Gamma-Butyrolactone (GBL) are central nervous system depressants sometimes used as recreational drugs, particularly in nightclubs. In Australia, the possession, supply, or importation of GBL or GHB is illegal and can result in severe criminal penalties. GBL is an industrial chemical found in paint strippers and stain removers and is dangerous even in small doses. It is also known as coma in a bottle.
| Characteristics | Values |
|---|---|
| GBL Classification in Australia | Health-endangering substance, border-controlled drug |
| GBL Status | Illicit |
| GBL Use | Prohibited |
| GBL Possession | Prohibited |
| GBL Supply | Prohibited |
| GBL Importation | Prohibited |
| GBL Criminal Penalties | Yes |
| GBL Criminal Penalties Examples | Imprisonment, fines |
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What You'll Learn

GBL is a health-endangering substance in Australia
GBL, or Gamma-Butyrolactone, is a health-endangering substance in Australia. It is not classified as a drug but is a central nervous system depressant, sometimes used as a recreational drug, particularly in nightclubs. GBL is rapidly converted into GHB (Gamma-Hydroxybutyric acid) by the body, producing identical psychoactive effects. These effects include inducing relaxation, euphoria, and sometimes sedation.
Due to the health dangers posed by GBL, its possession, supply, or importation in Australia could result in serious criminal penalties. Under the Federal Standard for the Uniform Scheduling of Medicines and Poisons, GBL is classified as a Schedule 10 substance when in a non-polymerised form in preparations for domestic and cosmetic use. This classification means that there is a strict prohibition on the supply and use of GBL in Australia.
The unauthorised sale or supply of GBL in every State and Territory in Australia is a serious criminal offence. GBL is considered a 'border-controlled drug' under the Criminal Code Act 1995 (Cth). A man in Western Australia was charged with importing 26 litres of GBL, which was referred to as an "illicit substance" by the Australian Federal Police.
The NSW Drug Misuse and Trafficking Act 1985 (NSW) classifies GBL as a 'prohibited drug', with a maximum penalty of two years imprisonment and/or a fine of $2,200 for possession. Similar offences apply throughout Australia, with variations in specific penalties.
In summary, GBL is a health-endangering substance in Australia due to its depressant and psychoactive effects. Its possession, supply, or importation is strictly prohibited and can result in significant criminal penalties, including imprisonment and fines.
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GBL is a central nervous system depressant
GBL (gamma-butyrolactone) is a central nervous system depressant. When ingested, it is converted into GHB (gamma-hydroxybutyrate) by the body, producing identical psychoactive effects. GBL is often found in industrial solvents and cleaning products. It has previously been allowed in Australia for domestic or cosmetic purposes, but this is no longer the case.
As a central nervous system depressant, GBL slows down the activity of the brain and other parts of the central nervous system. It induces relaxation, euphoria, and sometimes sedation. The effects of GBL can be felt within 15 minutes and typically last for around 3 to 4 hours. The dose-effect curve for GBL is steep, meaning that small increases in dosage can cause disproportionate increases in behavioural effects and toxicity. For example, a recreational dose of 1-2 grams can induce feelings of euphoria, but a slight increase in dosage can lead to drowsiness and marked effects on speech and motor coordination.
GBL is a potent depressant, and its mechanism of action involves interacting with and binding to receptors for the major inhibitory neurotransmitter gamma-aminobutyric acid (GABA), specifically the GABA-B receptor subtype. This differentiates GBL from other sedative-hypnotics, which typically interact with the GABA-A receptor subtype.
The use of GBL as a recreational drug is associated with several risks. Firstly, it is very easy to overdose on GBL, as the difference between the amount required for the desired effect and the amount leading to an overdose is minimal. Overdose can lead to respiratory depression and circulatory collapse. Secondly, GBL can cause impaired coordination, memory loss, and loss of consciousness. Mixing GBL with other drugs, such as alcohol, opioids, ketamine, or benzodiazepines, can further increase the risk of difficulty breathing, passing out, and even death.
The possession, supply, or importation of GBL in Australia is prohibited and can result in criminal penalties. GBL is classified as a Schedule 10 substance under the Federal Standard for the Uniform Scheduling of Medicines and Poisons, indicating a strict prohibition on its supply and use in the country.
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GBL is converted into GHB in the body
GBL, or gamma-butyrolactone, is a chemical precursor to GHB. When ingested, the body rapidly metabolizes GBL into GHB, producing identical psychoactive effects. GHB, or gamma-hydroxybutyrate, is a naturally occurring substance in the human body that acts as a central nervous system depressant, inducing relaxation, euphoria, and sometimes sedation.
GBL is considered a "prodrug" of GHB due to its chemical similarity, which means it is converted into GHB in the body. GBL is two to three times more potent than GHB, with a faster onset of action and a longer duration of effects. This makes GBL a greater risk for overdose than GHB, although both drugs can have serious consequences from overconsumption, including coma and death.
The process of converting GBL into GHB in the body involves the body's natural metabolic processes. After ingestion, the body breaks down the GBL molecule, resulting in the formation of GHB. This conversion occurs rapidly, allowing the effects of GBL to be felt quickly.
The effects of GBL and GHB are closely related. Both substances can produce a euphoric, disinhibiting effect when used recreationally and are sometimes used by bodybuilders to promote the production of growth hormones. However, GBL and GHB are known to be addictive, particularly with regular use over weeks or months. Additionally, combining GBL with certain medications or other drugs, such as amphetamines, can lead to serious side effects, including an increased risk of seizures.
In Australia, the possession, supply, or importation of GBL or GHB is prohibited and carries hefty criminal penalties. GBL is classified as a Schedule 10 substance under the Federal Standard for the Uniform Scheduling of Medicines and Poisons, meaning it is subject to strict prohibition on supply and use within the country.
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GBL is illegal to import into Australia
GBL, or Gamma-Butyrolactone, is a central nervous system depressant that is sometimes used as a recreational drug, particularly in nightclubs. It is not classified as a drug in Australia but as a health-endangering substance.
GBL was previously allowed to be imported into Australia as a cosmetic or domestic product. However, a legal change in 2023 closed this loophole. Now, the importation of GBL into Australia is illegal and can result in hefty criminal penalties.
Under the Federal Standard for the Uniform Scheduling of Medicines and Poisons, GBL is classified as a Schedule 10 substance when in a non-polymerised form in preparations for domestic and cosmetic use. This classification means that it is subject to a strict prohibition on supply and use in Australia.
Import offences depend on the quantity of GBL imported, which could be a general, marketable, or commercial quantity. The maximum penalties for importation offences are 10 years of imprisonment for importing less than a marketable quantity of GBL.
The Australian Federal Police (AFP) and the Australian Border Force (ABF) work together to stop illicit substances, including GBL, from reaching Australian communities and causing harm.
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GBL possession carries heavy penalties in Australia
GBL, or Gamma-Butyrolactone, is a central nervous system depressant that is sometimes used as a recreational drug, particularly in nightclubs. In Australia, the possession, supply, or importation of GBL can result in heavy criminal penalties.
Under the Federal Standard for the Uniform Scheduling of Medicines and Poisons, GBL is classified as a Schedule 10 substance when in a non-polymerised form in preparations for domestic and cosmetic use. This classification indicates a strict prohibition on the supply and use of GBL in Australia.
The NSW Drug Misuse and Trafficking Act 1985 (NSW) further reinforces the illegal nature of GBL, classifying it as a 'prohibited drug'. This means that individuals found to have GBL in their possession, custody, or control can be charged with a maximum penalty of two years imprisonment and/or a fine of $2,200.
The unauthorised sale or supply of GBL is also considered a serious criminal offence in every State and Territory in Australia. This is because GBL is considered a 'border-controlled drug' under the Criminal Code Act 1995 (Cth). The import of GBL is heavily regulated, with import offences depending on the quantity imported, which can be classified as a general, marketable, or commercial quantity.
In summary, GBL possession, supply, and importation carry significant penalties in Australia due to its classification as a prohibited and controlled substance.
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Frequently asked questions
GBL stands for Gamma-Butyrolactone and is a chemical precursor to GHB. When ingested, it is converted into GHB by the body, producing identical psychoactive effects.
Yes, GBL is illegal in Australia. The possession, supply, or importation of GBL in Australia could result in hefty criminal penalties.
The NSW Drug Misuse and Trafficking Act 1985 classify GBL as a prohibited drug. Possession of GBL carries a maximum penalty of two years imprisonment and/or a fine of $2,200.
The unauthorised sale or supply of GBL in every State and Territory in Australia is a serious criminal offence. The maximum penalties for importation offences are 10 years imprisonment for importing less than a marketable quantity of GBL.
GBL is an industrial chemical found in products like paint strippers and stain removers. It is dangerous to ingest, even in tiny doses, and can cause severe side effects, including convulsions, loss of consciousness, memory loss, respiratory difficulties, coma, and even death. GBL is also not classified as a drug but as a health-endangering substance.















