GBL is usually diluted with water or juice and is virtually tasteless, but produces a high not dissimilar to ecstasy.

GBL is usually diluted with water or juice and is virtually tasteless, but produces a high not dissimilar to ecstasy.

 

It can damage the kidneys, liver and the stomach lining and can lead to psychosis.

Once in the body, chemical reactions turn GBL into now notorious drug GHB, which was banned in 2003 because it was being used as a date rape drug.

Although legal for use in the chemical industry - in cleaning products, solvents and paints - it has been banned for recreational use since 2009 and is a Class C drug.

Deaths that have been linked with GBL include that of Sarah O'Dowd, 24, who drowned in her bath in October 2007.

Brighton medical student Hester Stewart died in April after taking GBL and drinking alcohol. 

A 25-year-old man died hours after taking GBL on its own while out clubbing in 2008.

But because traces of GBL remain in the body for only up to 12 hours after consumption, the true number of fatalities is unknown.