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DIVALPROEX SODIUM vs ZARONTIN

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 19, 2026·How we rate

Possible drug interaction. DIVALPROEX SODIUM and ZARONTIN are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Rating

68/100
New

Pharmacy pays

~$5.99 /30
~$7.42 /30

Type

RX
RX

Active ingredient

DIVALPROEX SODIUM
ETHOSUXIMIDE

Dosage forms

Capsule, Oral pellets, Capsule, delayed release, Tablet, delayed release, Tablet, extended release
Capsule, Solution

Drug class

Anti-Epileptic Agent

Boxed warning

Half-life

about 9 to 16 hours (the label's mean terminal half-life range for valproate monotherapy)

Treats

Bipolar Disorder, Epilepsy, Absence Epilepsy
Absence Epilepsy

Frequently asked questions

Which is cheaper, Divalproex Sodium or Zarontin?

Divalproex Sodium costs pharmacies less to acquire — about $5.99 vs $7.42 for a 30-count supply, per the CMS NADAC survey. That gap is in the pharmacy's cost of goods, not necessarily in what you pay: your price is set afterwards by your insurer and the pharmacy.

What is the difference between Divalproex Sodium and Zarontin?

Divalproex Sodium contains Divalproex Sodium, while Zarontin contains Ethosuximide — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.