Zonisamidedrug info
zonisamide 100 MG Oral Capsule
What it is used for
Zonisamide capsules are indicated as adjunctive therapy in the treatment of partial seizures in adults with epilepsy.
Text above is quoted in full from the FDA-approved drug label published by openFDA, effective August 1, 2025. Matched to this product by RxNorm code. Cross-references to other sections of the full prescribing information have been removed, since they point to a document not shown here. Nothing else is changed: no sentence is shortened, reworded or summarised.
Description
Zonisamide is an antiseizure drug chemically classified as a sulfonamide and unrelated to other antiseizure agents. The active ingredient is zonisamide, 1,2-benzisoxazole-3-methanesulfonamide. The molecular formula is C 8 H 8 N 2 O 3 S with a molecular weight of 212.23. Zonisamide, USP is a white to off white crystalline powder, pKa=10.2, and is moderately soluble in water (0.80 mg/mL) and 0.1 N HCl (0.50 mg/mL).
The chemical structure is: Zonisamide capsules, USP contain 25 mg or 50 mg or 100 mg zonisamide. Each capsule contains the inactive ingredients FD&C Blue #1, FD&C Red #4, gelatin, hydrogenated vegetable oil, microcrystalline cellulose, sodium lauryl sulfate, and titanium dioxide. The capsule is imprinted with black pharmaceutical ink and contains following inactive ingredients: black iron oxide, potassium hydroxide, propylene glycol and shellac. Structured formula for Zonisamide
Text above is quoted in full from the FDA-approved drug label published by openFDA, effective August 1, 2025. Matched to this product by RxNorm code. Cross-references to other sections of the full prescribing information have been removed, since they point to a document not shown here. Nothing else is changed: no sentence is shortened, reworded or summarised.
This page reproduces regulatory text for reference. It is not medical advice, and KenyRx is not a pharmacy or a prescriber. Talk to a doctor or pharmacist about whether a medicine is right for you.
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