PHENYTOIN SOD EXT 100 MG CAP

What it is

PHENYTOIN SOD EXT 100 MG CAP is how the CMS NADAC file names this product. The FDA NDC Directory lists it as phenytoin sodium, under the trade name “Extended Phenytoin Sodium”.

FDA gives its dosage form as “capsule, extended release” and “capsule” and its route as oral.

FDA lists 5 labelers (the companies named on the label) for its NDCs, among them Major Pharmaceuticals, AvPAK and Sun Pharmaceutical Industries, Inc.

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

The NADAC file of 2026-10-14 prices it under 9 NDCs (National Drug Codes); the FDA directory lists 7 of them.

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 $4.35 for 30 capsules (30 × $0.145 per EA, 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 code for it: 1, calculated from the most recently completed pharmacy survey.

What NADAC measures · Why 30 capsules · NADAC explanation codes

The 5 labelers

Other strengths, forms and brands

1 other product in the NADAC file shares the FDA nonproprietary name phenytoin sodium with PHENYTOIN SOD EXT 100 MG CAP.

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. 2026-09-23 · 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 9 NDCs’ NADAC prices is $0.145 per EA filed.

Of the 85 other products in FDA’s Anti-epileptic Agent class priced per EA, 67 have a higher middle NADAC price and 18 a lower one. The one in the middle is PHENYTEK 200 MG CAPSULE, at $1.4026 per EA 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 30 capsules? Is it lower than what I would pay through my insurance?
• These are questions about price, not medical advice. Do not change or stop a medicine without talking to your prescriber or pharmacist.