Manufacturer: Pfizer Laboratories manufactures Zarontin.


The uses of Zarontin include:

ZARONTIN is indicated for the control of petit mal epilepsy.

This medication is used alone or with other medications to control certain types of seizure problems (e.g., absence or petit mal seizures). Controlling seizures helps to prevent injury from falling and allows you to lead a more normal life. Ethosuximide belongs to a class of drugs known as anticonvulsants. It works by controlling the abnormal electrical activity in the brain that occurs during a seizure.

Dosage and Administration

ZARONTIN is administered orally.

Recommended initial daily dose for children and adults is approximately 20-30 mg/kg administered in two divided doses. This regimen will frequently achieve plasma levels in the therapeutic range of 40-100 mg/L. (Optimum 75 mg/L). As the dose serum level relationship may be curvilinear in individual patients dosage should be increased by small increments.

One useful method is to increase the daily dose by 250 mg every four to seven days until control is achieved with minimal side effects. Dosages exceeding 1.5 g daily, in divided doses should be administered only under the strictest supervision of the physician. Plasma level monitoring is recommended. ZARONTIN may be administered in combination with other anticonvulsants when other forms of epilepsy coexist with petit mal.