GHB is a sedative used both as a sleep-aid and as a recreational intoxicant. It is known for its ability to induce a short (several hours) coma-like sleep at high doses. A number of GHB-related deaths in combination with its addiction potential led to it being made illegal in 1999. GHB is also used as a date rape drug and is masked by pouring the liquid form into drinks to hide the salty taste. The combination of alcohol with GHB makes the narcotic even more dangerous. Chemicals such as Gamma Butyrolactone (GBL) are used to make GHB and if taken orally, GBL is naturally converted into GHB by the human body. The peak high lasts 1-3 hours and symptoms include euphoria, anxiety, loss of inhibition, and impaired judgment. High doses can lead to respiratory depression, vomiting, seizures, coma and death. GHB is often used in club and music festival settings.