Sodium oxybate Kalceks helps adults with narcolepsy-cataplexy by improving their nighttime sleep.
The starting dose is usually 4.5 grams per day, divided into two equal doses (2.25 grams per dose).
Take this medicine by mouth twice every evening. Take the first dose just before going to bed and the second dose 2.5–4 hours later. Prepare both doses before bedtime and take them within 24 hours. Take the medicine 2-3 hours after a meal, as food can reduce its absorption.
The maximum daily dose is 9 grams, divided into two equal doses.