Used for Epilepsy

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Programs are suitable for individuals who want to buy ethosuximide without insurance, with insurance or for those who are underinsured. You can pay as little as $0 per fill.*

Manufactured by various FDA-approved generic manufacturers.

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Updated on 24 Apr 2024

Learn more about ethosuximide

What dosages is ethosuximide available in?

What dosages is ethosuximide available in?

ethosuximide is available as a 250 mg oral capsule and a 250 mg/5 ml oral solution.

What is ethosuximide used for?

What is ethosuximide used for?

ethosuximide is an antiepileptic that is used to treat absence (petit mal) seizures.

How does ethosuximide work?

How does ethosuximide work?

ethosuximide is an antiepileptic (anti-seizure) medication. It calms certain nerves and brain activity that are linked to seizures in people who have absence (petit mal) epilepsy (a condition with recurring seizures).

How do I take ethosuximide?

How do I take ethosuximide?

ethosuximide is dosed as follows:

  • Children 3 to 6 years of age: Start with 250 mg by mouth per day
  • Adults and children 6 years of age and older: Start with 500 mg by mouth per day
  • If necessary, your or your child’s provider will adjust the dose after a few days until they find the right dose for you
  • The typical long-term (maintenance) dose for children is about 20 mg/kg of bodyweight per day
Is it safe for me to take ethosuximide?

Is it safe for me to take ethosuximide?

ethosuximide is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you. You should not use this medication if you have a history of hypersensitivity to succinimides.

ethosuximide Common Side Effects

ethosuximide Common Side Effects

Common side effects of ethosuximide:

  • Poor appetite
  • Upset stomach
  • Nausea or vomiting
  • Diarrhea
  • Stomach cramps or pain
  • Weight loss
  • Drowsiness
  • Tiredness
  • Headache
  • Dizziness
  • Hiccups
  • Difficulty with walking, movement, or coordination
  • Difficulty concentrating
ethosuximide Serious Side Effects

ethosuximide Serious Side Effects

Serious side effects are rare with ethosuximide. Contact your healthcare provider immediately if you experience any of the following.

  • Low blood cell counts: getting sick more often, feeling weak or short of breath more than usual
  • Allergic reaction: severe rash, hives, difficulty breathing, swelling of the face, mouth, or throat
  • Thoughts of hurting yourself or of suicide
Effects of other drugs, drug classes and over-the-counter products on ethosuximide

Effects of other drugs, drug classes and over-the-counter products on ethosuximide

The following medications may interact with ethosuximide:

  • ethosuximide may interact with concurrently administered antiepileptic drugs so periodic serum level determinations of these drugs may be necessary (eg, ethosuximide may elevate phenytoin serum levels and valproic acid has been reported to both increase and decrease ethosuximide levels)
Who makes ethosuximide?

Who makes ethosuximide?

Various FDA-approved generic manufacturers

Is ethosuximide safe in pregnancy?

Is ethosuximide safe in pregnancy?

ethosuximide may be harmful to your baby, but there isn’t enough evidence out there to be sure of the risks. ethosuximide should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.There is a North American Antiepileptic Drug (NAAED) Pregnancy Registry that monitors the safety of anti-seizure medications during pregnancy. If you’re currently pregnant and taking ethosuximide, it’s encouraged that you enroll in the registry by visiting the website or calling 1-888-233-2334.


What to do if you missed your ethosuximide dose

The FDA's medical product safety reporting program for health professionals, patients and consumers.

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Medical Disclaimer

NowPatient has taken all reasonable steps to ensure that all material is factually accurate, complete, and current. However, the knowledge and experience of a qualified healthcare professional should always be sought after instead of using the information on this page. Before taking any drug, you should always speak to your doctor or another qualified healthcare provider.

The information provided here about medications is subject to change and is not meant to include all uses, precautions, warnings, directions, drug interactions, allergic reactions, or negative effects. The absence of warnings or other information for a particular medication does not imply that the medication or medication combination is appropriate for all patients or for all possible purposes.

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