Not to be mistaken with GBH the crime, although there are reasons why people might confuse the two. GHB is a dangerous drug which can cause grievous bodily harm. 

That's because it's hard to tell the difference between a dose that gives a pleasant buzz and an overdose that could kill you.

GHB is a colourless liquid sold in small bottles or capsules. The liquid is measured out in capfuls and then swallowed.

• A small capful has a euphoric effect that makes users feel happy, sensual and uninhibited. As more and more is taken it acts like a sedative or downer and makes people sleepy.
  
• Too much and users feel disoriented and sick. Muscles can go numb or start to spasm.
  
• Excessive use can cause a fit or seizure.

• It is very dangerous and can be fatal when mixed with alcohol or other drugs.
  
• Users can lose consciousness, as it's hard to know what strength the dose is.
  
• Too many hits could cause sickness, stiff muscles, fits and collapse.
  
• No one knows what GHB could do to you 20 years down the line.
  
• Because GHB can really knock you out it's been linked to drug assisted sexual assault. And because it's almost tasteless it's easily slipped in a drink. In a Home Office report in June 2000, 123 victims of drug-assisted assaults were questioned and 70% of the rapists were known to the victim. One in five could not remember the assault but 70% felt physically unable to resist. *
  
  * source: Metropolitan Police June 2000