Zarontin is prescribed to treat a type of epileptic seizure called absence seizures. It is not exactly clear how the drug works to treat these seizures, but it may work by affecting certain calcium channels in the brain. The medication is available in capsule form or as a syrup, and is usually taken once or twice daily. Some of the possible side effects of Zarontin include a loss of appetite, nausea, and diarrhea.

What Is Zarontin?

Zarontin® (ethosuximide) is a prescription medication used to treat absence seizures, a specific type of epileptic seizure. Absence seizures are also known as petit mal seizures.
(Click Zarontin Uses for more information on what the drug is used for, including possible off-label uses.)

Who Makes Zarontin?

Currently, Zarontin is made by Pfizer.

How Does It Work?

Epilepsy is a brain disorder caused by recurring, brief changes in the brain's electrical system. These changes in brain activity can lead to a seizure (see Epilepsy Symptoms). It is not known exactly how Zarontin works to treat absence seizures in people with epilepsy. It may work by affecting certain calcium channels in the brain.

When and How to Take Zarontin

Some general considerations for when and how to take the medication include the following:
  • Zarontin comes in capsule form and is taken by mouth once or twice daily. It is also available in a syrup form.
  • It can be taken with or without food. If it bothers your stomach, try taking it with food.
  • Zarontin should be taken at the same times each day to maintain an even level of the drug in your blood.
  • For the medication to work properly, it must be taken as prescribed. It will not work if you stop taking it.
  • Do not stop taking Zarontin without first discussing it with your healthcare provider (see Zarontin Withdrawal).
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Zarontin Drug Information

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