GHB, or gamma-hydroxybutyrate, is a central nervous system depressant that is often used recreationally for its euphoric and sedative effects. It is a colorless, odorless liquid that can also be found in powder form. Originally developed as an anesthetic, GHB is sometimes misused in party settings and is known for its potential to cause unconsciousness or memory loss. In addition to its recreational use, GHB has been studied for medical purposes, including treatment for narcolepsy and certain sleep disorders. However, it is classified as a controlled substance in many countries due to its potential for abuse and the risk of overdose, which can lead to serious health complications.