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xywav (calcium, magnesium, potassium, and sodium oxybates) oral solution
xywav (calcium, magnesium, potassium, and sodium oxybates) oral solution

Coming Soon!

The first and only lower-sodium oxybate for cataplexy and/or excessive daytime sleepiness (EDS) in narcolepsy

XYWAV oral solution, 0.5 g/mL total salts (equivalent to 0.413 g/mL of oxybate) is a prescription medicine used to treat the following symptoms in people 7 years of age or older with narcolepsy:

  • sudden onset of weak or paralyzed muscles (cataplexy)
  • excessive daytime sleepiness (EDS)

XYWAV is available only through a restricted program under a Risk Evaluation and Mitigation Strategy (REMS) called the XYWAV and XYREM® REMS.

XYWAV is a prescription medicine used to treat the following symptoms in people 7 years of age or older with narcolepsy:

  • sudden onset of weak or paralyzed muscles (cataplexy)
  • excessive daytime sleepiness (EDS)

Important Safety Information

WARNING: Taking XYWAV with other central nervous system (CNS) depressants such as medicines used to make you or your child fall asleep, including opioid analgesics, benzodiazepines, sedating antidepressants, antipsychotics, sedating anti-epileptic medicines, general anesthetics, muscle relaxants, alcohol, or street drugs, may cause serious medical problems, including trouble breathing (respiratory depression), low blood pressure (hypotension), changes in alertness (drowsiness), fainting (syncope), and death.

The active ingredient of XYWAV is a form of gamma hydroxybutyrate (GHB). Abuse or misuse of illegal GHB alone or with other drugs that cause changes in alertness (or consciousness) has caused serious side effects. These effects include seizures, trouble breathing (respiratory depression), changes in alertness (drowsiness), coma, and death. Call your doctor right away if you or your child has any of these serious side effects.

Because of these risks, you have to go through the XYWAV and XYREM REMS Program to have your or your child’s prescription for XYWAV filled.

Do not take XYWAV if you take or your child takes other sleep medicines or sedatives (medicines that cause sleepiness), drinks alcohol, or has a rare problem called succinic semialdehyde dehydrogenase deficiency.

Keep XYWAV in a safe place to prevent abuse and misuse. Selling or giving away XYWAV may harm others, and is against the law. Tell your doctor if you have ever abused or been dependent on alcohol, prescription medicines, or street drugs.

Anyone who takes XYWAV should not do anything that requires them to be fully awake or is dangerous, including driving a car, using heavy machinery, or flying an airplane, for at least 6 hours after taking XYWAV. Those activities should not be done until you know how XYWAV affects you or your child.

XYWAV can cause serious side effects, including the following:

  • Breathing problems, including slower breathing, trouble breathing, and/or short periods of not breathing while sleeping (sleep apnea). People who already have breathing or lung problems have a higher chance of having breathing problems when they use XYWAV.
  • Mental health problems, including seeing or hearing things that are not real (hallucinations), unusual or disturbing thoughts (abnormal thinking), feeling anxious or upset, depression, thoughts of killing yourself or trying to kill yourself, increased tiredness, feelings of guilt or worthlessness, or difficulty concentrating. Tell your doctor if you or your child have or had depression or have tried to harm yourself or themselves. Call your doctor right away if you have or your child has symptoms of mental health problems or a change in weight or appetite.
  • Sleepwalking. Sleepwalking can cause injuries. Call your doctor if you or your child starts sleepwalking. Your doctor should check you or your child.

The most common side effects of XYWAV in adults include headache, nausea, dizziness, decreased appetite, parasomnia (a sleep disorder that can include abnormal dreams, abnormal rapid eye movement (REM) sleep, sleep paralysis, sleep talking, sleep terror, sleep-related eating disorder, sleep walking, and other abnormal sleep-related events), diarrhea, excessive sweating (hyperhidrosis), anxiety and vomiting.

The most common side effects of XYWAV in children include bedwetting, nausea, headache, vomiting, weight decrease, decreased appetite, and dizziness.

XYWAV can cause physical dependence and craving for the medicine when it is not taken as directed. These are not all the possible side effects of XYWAV.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch, or call 1-800-FDA-1088.

Please see full Prescribing Information, including BOXED Warning, and Medication Guide.

XYWAV is a controlled substance (CIII) because the active ingredient is a form of gamma hydroxybutyrate, or GHB, a chemical that has been abused and misused. Abuse and misuse of illegal GHB can cause serious medical problems including seizures, trouble breathing, changes in alertness, coma, and death.
XYWAV can cause serious side effects including trouble breathing or changes in alertness. Call your doctor right away if you or your child has any of these serious side effects. Alcohol or medicines that cause sleepiness should not be used while taking XYWAV because they can make these side effects worse. Because of these risks, XYWAV is available only by prescription and filled through the Certified Pharmacy in the XYWAV and XYREM REMS Program. Both patients and their doctors have to join this Program.
XYWAV is a prescription medicine used to treat the following symptoms in people 7 years of age or older with narcolepsy:
  • sudden onset of weak or paralyzed muscles (cataplexy)
  • excessive daytime sleepiness (EDS)
XYWAV may only be given to patients enrolled in the XYWAV and XYREM REMS Program.