Xywav drug has main ingredients including Calcium oxybate, Magnesium oxybate, Potassium oxybate and Sodium oxybate equivalent to 0.5 g/ml, belonging to the group of psychotropic drugs. Xywav is commonly used in the treatment of patients with insomnia and excessive daytime sleepiness (EDS) aged 7 years and older with narcolepsy. Knowing the basic information such as ingredients, uses, doses and unwanted side effects of Xywax medicine will help patients improve treatment effectiveness.