PillRx only · Capsule · Oral
Ethosuximide
Brands: Zarontin · Ethosuximide
4 ACTIVE SUPPLIERS — US
openFDA · updated weekly
US5 NDCs
4 active makers
4 active makers
UKComing
soon
soon
CAComing
soon
soon
AUComing
soon
soon
EUComing
soon
soon
US acquisition costNADAC · per unit
Average across 5 priced NDCs. A benchmark of pharmacy acquisition cost — not a retail quote.
$0.454
Latest avg · Jul 22, 2026
+75%
Since Dec 17, 2025
4
Active US suppliers
60%
Top-2 supplier share*
Medicaid dispensing volumeSDUD · per quarter
Prescriptions dispensed under Medicaid (fee-for-service + managed care), summed nationally. The closest free proxy to sales volume — Medicaid only, not all-payer.
14K
Rx · 2026 Q1
1.8M
Units dispensed
+5%
Rx vs. year ago
5
Quarters · since 2025 Q1
Who makes it4 active · 0 exited
US labelers as registered with FDA. Repackagers relabel another company's product; share* is of listed packages, not sales.
| Labeler | Type | Packages | Status |
|---|---|---|---|
| Epic Pharma, LLC | unknown | 2 | SUPPLYING |
| Parke-Davis Div of Pfizer Inc | unknown | 1 | SUPPLYING |
| Chartwell RX, LLC | unknown | 1 | SUPPLYING |
| Strides Pharma Science Limited | unknown | 1 | SUPPLYING |
Regulatory & supply eventsFDA · US
Shortages, recalls, and registration changes attached to this drug concept.
- Sep 12, 2019RECALLRecall (Class III): Zarontin (ethosuximide capsules, USP) 250 mg, 100-count bottle, Rx Onl,y Made in Netherlands Distributed by Parke-Davis…
Labeling: Incorrect or Missing Lot and/or Exp Date. The expiry date on the product label is incorrect. The label states an expiry date of 09/2021 when it should be 09/2020. — Recalling firm: Pfizer Inc. — Nationwide in the USA