More than half of the doses being sold as the illegal drug GHB in nightclubs are actually made from a perfectly legal compound, the BBC has learned. The Tictac drugs database says about 60% of suspected GHB samples are in fact legal gamma butyrlactone (GBL), found in nail varnish remover.
The Advisory Council on the Misuse of Drugs is investigating and is due to report back to the Home Office shortly.
Like GHB, an overdose of highly toxic GBL can lead to coma or death.
GHB, or gamma hydroxybutyrate, occurs naturally in the brain in tiny quantities, but when taken as a drug induces euphoria and reduces inhibitions.