Ethosuximide (By Mouth)

Ethosuximide (eth-oh-SUX-i-mide)

Treats seizures in patients who have epilepsy.

Brand Name(s):

Zarontin
There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

You should not use this medicine if you have had an allergic reaction to ethosuximide or to similar medicine, such as methsuximide (Celontin®).

How to Use This Medicine:

Liquid Filled Capsule, Liquid

• Your doctor will tell you how much to take and how often.
• Take with food or after meals to avoid stomach upset.

If a dose is missed:

• Take the missed dose as soon as possible.
• If it is almost time for your next regular dose, wait until then to take your medicine and skip the missed dose.
• You should not use two doses at the same time, unless directed by your doctor.

How to Store and Dispose of This Medicine:

• Store at room temperature, away from heat, moisture, and direct light. Do not freeze the oral liquid.
• Keep all medicine out of the reach of children.

Drugs and Foods to Avoid:

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

• If you take more than one medicine to treat seizures, your doctor may need to check your blood levels of the medicines to make sure you are taking the right doses.

Warnings While Using This Medicine:

• Check with your doctor before taking ethosuximide if you have liver or kidney disease.
• If you are pregnant or breastfeeding, talk to your doctor before taking this medicine. If you become pregnant while taking this medicine, tell your doctor right away.
• Do not suddenly stop taking this medicine unless you have first checked with your doctor. To avoid increased seizures, you may need to take smaller and smaller doses before stopping completely.
• This medicine may cause drowsiness or dizziness. Be careful if you are driving or using dangerous machinery.

Possible Side Effects While Using This Medicine:

Call your doctor right away if you notice any of these side effects:

• Chest pain
• Fever, sore throat, unusual bleeding or bruising
• Skin rash, hives, itching
• Joint pain with fever and weakness

If you notice these less serious side effects, talk with your doctor:

• Stomach pain, appetite loss, nausea, vomiting
• Dizziness or drowsiness
• Irritability, trouble sleeping
• Diarrhea

If you notice other side effects that you think are caused by this medicine, tell your doctor.