GHB stands for Gamma Hydroxybutyrate.
Gamma-hydroxybutyrate, or GHB, is a potent central nervous system depressant. The illegal club drug is used for its alcohol-like effects, but it often causes people to lose consciousness. GHB is highly addictive and causes severe, and even deadly, withdrawal symptoms. When it was first used clinically in the 1960s, the central nervous system depressant GHB seemed to hold promise as a fast-acting anesthetic agent. Unfortunately, the addictive drug lacked any pain-killing properties and also tended to trigger seizures. The medical community quickly abandoned interest in its clinical use.