The best amount is the amount that completely controls seizures without causing troublesome side effects. It depends on many factors, which are different for every individual. Follow the doctor's directions. Call if you have any questions.

In young adults, Felbatol is usually started at 600 to 1,200 milligrams (mg) per day in 3 to 4 divided doses. Every 7 to 14 days, the amount can be increased by 600 to 1,200 mg per day if needed (if side effects are not troublesome), to a maximum dose of 3,600 mg day in 3 to 4 divided doses.

In children over 6, the daily starting dose is 15 mg per kilogram (kg, about 2.2 pounds) of body weight, given in 3 or 4 divided doses. The usual ongoing dose is 15 to 45 mg per kg per day, usually in 3or 4 divided doses.