ETHOSUXIMIDE- ethosuximide capsule 
Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc.



Ethosuximide Capsules, USP

(Etho sux i mide)

Read this Medication Guide before you start taking ethosuximide capsules and each time you get a refill. There may be new information. This information does not take the place of talking to your healthcare provider about your medical condition or treatment. If you have any questions about ethosuximide capsules, ask your healthcare provider or pharmacist.

What is the most important information I should know about ethosuximide capsules?

Do not stop taking ethosuximide capsules without first talking to your healthcare provider.

Stopping ethosuximide capsules suddenly can cause serious problems.

Ethosuximide capsules can cause serious side effects, including:

1. Rare but serious blood problems that may be life-threatening. Call your healthcare provider right away if you have:

2. Drug reactions that may affect different parts of the body such as your liver, kidneys, heart, or blood cells. You may or may not have a rash with these types of reactions. These reactions can be very serious and can cause death. Call your healthcare provider right away if you have any of these symptoms:

3.Like other antiepileptic drugs, ethosuximide capsules may cause suicidal thoughts or actions in a very small number of people, about 1 in 500.

Call a healthcare provider right away if you have any of these symptoms, especially if they are new, worse, or worry you:

How can I watch for early symptoms of suicidal thoughts and actions?

Call your healthcare provider between visits as needed, especially if you are worried about symptoms.

Do not stop ethosuximide capsules without first talking to a healthcare provider.

Suicidal thoughts or actions can be caused by things other than medicines. If you have suicidal thoughts or actions, your healthcare provider may check for other causes.

What are ethosuximide capsules?

Ethosuximide capsules are prescription medicine used to treat absence (petit mal) seizures.

Who should not take ethosuximide capsules?

Do not take ethosuximide capsules if you are allergic to succinimides (methsuximide or ethosuximide), or any of the ingredients in ethosuximide capsules. See the end of this Medication Guide for a complete list of ingredients in ethosuximide capsules.

What should I tell my healthcare provider before taking ethosuximide capsules?

Before you take ethosuximide capsules, tell your healthcare provider if you:

Tell your healthcare provider about all the medicines you take, including prescription and non-prescription medicines, vitamins, and herbal supplements. Taking ethosuximide capsules with certain other medicines can cause side effects or affect how well they work. Do not start or stop other medicines without talking to your healthcare provider.

Know the medicines you take. Keep a list of them with you to show your healthcare provider and pharmacist when you get a new medicine.

How should I take ethosuximide capsules?

What should I avoid while taking ethosuximide capsules?

What are the possible side effects of ethosuximide capsules?

Ethosuximide capsules may cause other serious side effects, including:

Call your healthcare provider right away, if you have any of the symptoms listed above.

The most common side effects of ethosuximide capsules include

          nausea or vomiting          fatigue
          indigestion, stomach pain          dizziness or lightheadedness
          diarrhea          unsteadiness when walking
          weight loss          headache
          loss of appetite          loss of concentration

Tell your healthcare provider about any side effect that bothers you or that does not go away.

These are not all the possible side effects with ethosuximide capsules. For more information, ask your healthcare provider or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

How should I store ethosuximide capsules?

Keep ethosuximide capsules and all medicines out of the reach of children.

General information about ethosuximide capsules

Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use ethosuximide capsules for a condition for which it was not prescribed. Do not give ethosuximide capsules to other people, even if they have the same condition. It may harm them.

This Medication Guide summarizes the most important information about ethosuximide capsules. If you would like more information, talk with your healthcare provider. You can ask your healthcare provider or pharmacist for information about ethosuximide capsules that is written for healthcare professionals.

Address medical inquiries to Tel: 1.866.901.DRUG (3784)

What are the ingredients in ethosuximide capsules, USP?

Active ingredient: ethosuximide, USP

Capsules Inactive ingredients:

FD&C red # 40 aluminum lake, FD&C yellow # 6 aluminum lake, gelatin, glycerin, light mineral oil, methyl paraben, polyethylene glycol, propyl paraben, and sorbitol. The capsule shell is imprinted with white imprinting ink containing opacode white S-1-7078 as colorant which contains the following inactive ingredients: ammonium hydroxide, isopropyl alcohol, n-butyl alcohol, propylene glycol, shellac glaze, simethicone and titanium dioxide.

This Medication Guide has been approved by the U.S. Food and Drug Administration.

Dispense with Medication Guide available at:

Distributed by:

Avet Pharmaceuticals Inc.

East Brunswick, NJ 08816

1.866.901.DRUG (3784)



Revised: 11/2021

Revised: 12/2021
Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc.