Why does this page start at 1 mL?

The FDA package descriptions of this product’s NDCs give different amounts (473 mL, 474 mL). So the card starts at 1 ML; change it to match your prescription.

ETHOSUXIMIDE 250 MG/5 ML SOLN

For 1 mL

Pharmacies pay

$0.10 filed

1 × $0.10045 per ML

CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17

Medicare

We don’t know yet

No Medicare reference price. Part D: OpenBill did not match this NDC to a usable Medicare Part D spending row. Either Part D has none for it, or the rows that share its name could not safely be tied to it (for example, they mix units, routes or release forms, or the drug is sold over the counter, which Part D does not cover). Part B: This NDC is not in the current quarter’s Medicare Part B NDC-HCPCS crosswalk, so it has no Part B payment limit.

The spread

We don’t know yet

There is no Medicare figure to compare with, so there is no spread.

Cost-plus estimate

$5.12 estimated

$0.10 + $0.02 (15%) + $5.00 fee per fill = $5.12

This is a model, not a price any pharmacy quoted. Shipping is not included. For a pack this cheap, the $5.00 fee is most of the estimate. How it is worked out

OpenBill calculation · nadac-national-average-drug-acquisition-cost-20261014.csv · NADAC eff. 2026-09-23 (file of 2026-10-14, retrieved 2026-10-17)

Open the interactive card Change the quantity, type what you were charged, and see every record in full.

What it is

ETHOSUXIMIDE 250 MG/5 ML SOLN is how the CMS NADAC file names this product. The FDA NDC Directory lists it as ethosuximide.

FDA gives its dosage form as solution and its route as oral.

Its labelers, the companies named on the label, are PAI Holdings, LLC dba PAI Pharma and Mylan Pharmaceuticals Inc.

FDA’s Established Pharmacologic Class for it is Anti-epileptic Agent.

The NADAC file of 2026-10-14 prices it under 2 NDCs (National Drug Codes).

NADAC classes it as a generic drug (rate-setting class G), and does not mark it as sold over the counter.

What pharmacies pay

Pharmacies pay $0.10 for 1 mL (1 × $0.10045 per ML, rounded to the cent), by the CMS NADAC file of 2026-10-14; that price took effect on 2026-09-23. That is what pharmacies pay their suppliers, not what they charge you.

NADAC’s explanation codes for it: 1, calculated from the most recently completed pharmacy survey; 5, calculated based on package size.

What NADAC measures · NADAC explanation codes

All 2 NDCs

00121-0670-16 · PAI Holdings, LLC dba PAI Pharma · $0.10045 per ML · eff. 2026-09-23 filed
59762-2350-07 · Mylan Pharmaceuticals Inc. · $0.10045 per ML · eff. 2026-09-23 filed

Other strengths, forms and brands

2 other products in the NADAC file share the FDA nonproprietary name ethosuximide with ETHOSUXIMIDE 250 MG/5 ML SOLN.

Product	Pharmacies pay per unit	Medicare per unit
ETHOSUXIMIDE 250 MG CAPSULE generic · capsule / capsule, liquid filled	$0.24349 per EA filed eff. 2026-09-23	We don’t know yet
ETHOSUXIMIDE 250 MG/5 ML SOLN this page generic · solution	$0.10045 per ML filed eff. 2026-09-23	We don’t know yet
ZARONTIN 250 MG CAPSULE brand · capsule	$1.30857 per EA filed eff. 2026-01-01	$1.13247 per EA filed Part D 2024 average

Part D is one average per brand and generic name, over every strength and form.

CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-01-01, 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17

Medicare Part D · DSD_PTD_RY26_P04_V10_DY24_BGM.csv · eff. 2024-01-01 to 2024-12-31 · as of 2026-06-25 · retrieved 2026-10-18

Compared with its class

The middle of its 2 NDCs’ NADAC prices is $0.10045 per ML filed.

Of the 7 other products in FDA’s Anti-epileptic Agent class priced per ML, 5 have a higher middle NADAC price and 2 a lower one. The one in the middle is FELBAMATE 600 MG/5 ML SUSP, at $0.35611 per ML filed (eff. 2026-09-23).

Prices are compared per unit, whatever the strength or dose, and a class is not a list of substitutes.

CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17

How the class comparison works

What Medicare paid

We don’t know yet; the card above says why.

Which Medicare figure OpenBill compares · How Part D is matched · How Part B is matched

What to ask at the counter

None of these figures is your price: what you pay depends on your pharmacy, your insurance, coupons and discounts.

What is your cash price for 1 mL? Is it lower than what I would pay through my insurance?
How much is in the package I am getting? This page uses 1 mL; your package may hold a different amount.
These are questions about price, not medical advice. Do not change or stop a medicine without talking to your prescriber or pharmacist.

Questions

Why does this page start at 1 mL?: The FDA package descriptions of this product’s NDCs give different amounts (473 mL, 474 mL). So the card starts at 1 ML; change it to match your prescription.

Its pharmacologic class

Anti-epileptic Agent 94 products