Uses: This medication is used to treat narcolepsy, a condition that causes severe daytime sleepiness. It can decrease symptoms such as daytime sleepiness, unwanted daytime naps/sleep attacks, and nighttime awakening. It also reduces the number of sudden short attacks of weak/paralyzed muscles (known as cataplexy) that can also occur in patients with narcolepsy. Sodium oxybate is a central nervous system depressant. It is also known as gamma hydroxybutyrate (GHB).