PHENYTEK 200 MG CAPSULE

What it is

PHENYTEK 200 MG CAPSULE is how the CMS NADAC file names this product. The FDA NDC Directory lists it as extended phenytoin sodium, under the trade name “Phenytek”.

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

The labeler, the company named on the label, is 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 in its brand rate-setting class B-ANDA, and does not mark it as sold over the counter.

What pharmacies pay

Pharmacies pay $42.08 for 30 capsules (30 × $1.4026 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 codes for it: 1, calculated from the most recently completed pharmacy survey; 6, the CMS Covered Outpatient Drug Product File S/I/N drug category was not applied when grouping drugs for the calculation.

What NADAC measures · Why 30 capsules · NADAC explanation codes

All 2 NDCs

• 00378-2670-01 · Mylan Pharmaceuticals Inc. · $1.4026 per EA · eff. 2026-09-23 filed
• 00378-2670-93 · Mylan Pharmaceuticals Inc. · $1.4026 per EA · eff. 2026-09-23 filed

Other strengths, forms and brands

2 other products in the NADAC file share the FDA nonproprietary name extended phenytoin sodium with PHENYTEK 200 MG CAPSULE.

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, 2026-09-30 · 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 $1.4026 per EA filed.

Of the 85 other products in FDA’s Anti-epileptic Agent class priced per EA, 42 have a higher middle NADAC price and 43 a lower one. The one in the middle is PRIMIDONE 125 MG TABLET, at $1.37851 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

Medicare Part D paid $37.20 for 30 capsules, at an average of $1.24015 per EA in 2024 (2024-01-01 to 2024-12-31) for “Phenytek” and “Phenytoin Sodium Extended”, every strength and form sold under that name together (Medicare Part D Spending by Drug, file of 2026-06-25).

That average covers 18,921 Part D claims (fills, including refills) for 2024-01-01 to 2024-12-31, across every maker, strength and form under the name.

Medicare's price is not your price.

What Part D spending measures · Which Medicare figure OpenBill compares · How the spread is worked out

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?
• If you have Medicare Part D: what is my plan’s copay or coinsurance for it? The Part D average on this page is not what you pay.
• These are questions about price, not medical advice. Do not change or stop a medicine without talking to your prescriber or pharmacist.