GBL

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GBL is a prodrug of GHB. To bypass GHB restriction laws, home synthesis kits were introduced to transform GBL and/or 1,4-B into GHB. GBL can also be used as a recreational drug by itself.

GBL overdose can cause severe sickness, coma and death.

Metabolism takes place in stomach and blood plasma. GBL is longer acting and has a shorter onset than GHB. Otherwise, effects are similar to GHB, although weight for weight it is significantly more powerful, meaning dosage must be lowered accordingly. If ingested undiluted through orally, GBL can cause esophogeal and gastro-intestinal irritation. It is possible for oral ingestion of GBL to cause nausea and other similar problems, possibly more so than with GHB.

Dose

A milliliter of pure GBL metabolizes to roughly 1.6g of GHB, so doses are measured in the single milliliter range, either taken all at once or sipped over the course of a night. GBL has a distinctive taste and odour. When taken orally its taste has been likened to stale water and is regarded as putred.

Legal Status of GBL

FDA warning against products containing GHB and its prodrugs, such as GBL.

Canada: GBL is a Controlled Substance under Schedule VI of the "Controlled Drugs and Substances Act" in Canada. Schedule VI of the "Controlled Drugs and Substances Act" requires vendors to collect information regarding purchases of GBL. It is not illegal for an individual to possess GBL in Canada.

United Kingdom: GBL is an unclassified drug in the United Kingdom.

Sweden: GBL is not classified as a drug but as a health dangering substance.