FDA Orange Book
Generic for Zarontin
Zarontin contains ethosuximide. Orange Book status for every listed strength, the approved generic makers, and the listed patents and exclusivities.
Source: FDA Orange Book data file dated 2026-10-09. Publisher page
Yes. The generic name for Zarontin is ethosuximide. 4 companies hold an active FDA approval (ANDA) for a generic version in the Orange Book. Therapeutic equivalence codes: AB.
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Zarontin products in the Orange Book
| Form and route | Strength | Brand status | Brand TE | Active generics | Generic TE codes |
|---|---|---|---|---|---|
| capsule, oral | 250MG | Marketed (Rx) | AB | 4 | AB |
NDA 012380, held by PARKE DAVIS DIV WARNER LAMBERT CO. Active generics are ANDA products in the Orange Book prescription list with the same ingredient, dosage form, route and strength.
Approved generic ethosuximide
| Company | ANDA | TE code | Approved | Strengths |
|---|---|---|---|---|
| BIONPHARMA INC | 040430 | AB (A-rated, therapeutically equivalent) | October 28, 2002 | 250MG |
| EPIC PHARMA LLC | 040686 | AB (A-rated, therapeutically equivalent) | May 28, 2008 | 250MG |
| ONESOURCE SOFTGELS PTE LTD | 211928 | AB (A-rated, therapeutically equivalent) | February 19, 2019 | 250MG |
| PURACAP PHARMACEUTICAL LLC | 210654 | AB (A-rated, therapeutically equivalent) | March 16, 2020 | 250MG |
Zarontin NDC codes
Questions
Is there a generic for Zarontin?
Yes. The generic name for Zarontin is ethosuximide. 4 companies hold an active FDA approval (ANDA) for a generic version in the Orange Book. Therapeutic equivalence codes: AB.
What is the generic name for Zarontin?
The active ingredient in Zarontin is ethosuximide, per the FDA Orange Book.
What does a therapeutic equivalence code mean?
In the Orange Book, codes that start with A (such as AB) mean FDA considers the product therapeutically equivalent to the reference drug. Codes that start with B mean FDA does not, at this time, consider the product therapeutically equivalent.