GHB (gamma hydroxybutyrate, or gammahydroxy-butyric acid) is a depressant that is usually available in odorless and tasteless liquid form. It can also be sold as a powder or pill. It takes effect 10-20 minutes after it is ingested and its effects typically last up to four hours.12 People who use GHB (particularly when combined with other substances, such as alcohol) may experience nausea, drowsiness, dizziness, and breathing problems.13
Coma and seizures can occur following use of GHB. Combining use with other drugs such as alcohol can result in nausea and breathing difficulties. Chronic use of GHB may also produce withdrawal effects, including insomnia, anxiety, tremors, and sweating. GHB has been involved in poisonings, overdoses, date rapes, and deaths.