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Active ingredient

Ethosuximide

12 finished FDA listings contain Ethosuximide as their only active ingredient.

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FDA NDC Directory

Ingredient names as written by FDA
ETHOSUXIMIDE
Dosage forms
Capsule, Capsule, Liquid Filled, Solution
Routes
Oral
Manufacturers / labelers
9
Strengths listed
250 mg/1 · 250 mg/5ml
Brand names in FDA listings
Zarontin

RxNorm (National Library of Medicine)

Ingredient concept RxCUI 4135

Drugs@FDA applications

Linked only where the FDA listing’s application number matches Drugs@FDA exactly. A listing in the NDC Directory does not by itself mean FDA approval.

ApplicationSponsorOriginal approvalListings
NDA 012380PARKE DAVIS1960-11-021
ANDA 080258PARKE-DAVIS1974-02-132
ANDA 040253PHARM ASSOC2000-11-221
ANDA 040430BIONPHARMA2002-10-282
ANDA 040506CHARTWELL RX2003-12-222
ANDA 200892HERITAGE PHARMS INC2012-09-251
ANDA 211928ONESOURCE2019-02-191
ANDA 210654PURACAP PHARM LLC2020-03-162

Official labeling on DailyMed

Sources: FDA NDC Directory (2026-09-29), RxNorm, Drugs@FDA, DailyMed. Each source’s facts are shown separately as published.