Ethosuximide is used to treat epilepsy by preventing absence (petit mal) seizures. It is called an anti-seizure medication. Ethosuximide works by controlling the neurotransmitters (chemicals) in the brain. Read more about anti-seizure medication.
August 2022: Temporary change of brand of ethosuximide capsules (Zarontin capsules)
For a few months from August 2022 until early 2023, Zarontin 250mg capsules will not be available in New Zealand. While Zarontin is not available, Ethosuximide Essential Generics is the substitute brand. This is made by the same manufacturer as Zarontin, but at a different site.
Learn more Supply issue: Zarontin capsules [PDF, 76 KB]