DILANTIN 50 MG INFATAB
FDA nonproprietary name: phenytoin
For 30 tablets
Pharmacies pay
$47.30 filed
30 × $1.57665 per EA
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
$59.40 estimated
$47.30 + $7.10 (15%) + $5.00 fee per fill = $59.40
This is a model, not a price any pharmacy quoted. Shipping is not included. 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
DILANTIN 50 MG INFATAB is how the CMS NADAC file names this product. The FDA NDC Directory lists it as phenytoin, under the trade name “Dilantin Infatabs”.
FDA gives its dosage form as tablet, chewable and its route as oral.
The labeler, the company named on the label, is Parke-Davis Div of Pfizer Inc.
FDA’s Established Pharmacologic Class for it is Anti-epileptic Agent.
The NADAC file of 2026-10-14 prices it under one NDC (National Drug Code), 00071-0007-24.
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 $47.30 for 30 tablets (30 × $1.57665 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.
NADAC also lists, on the row of one brand NDC, what pharmacies pay for the generic equivalent, a different product: $0.20122 per EA filed.
CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17
What NADAC measures · Why 30 tablets · NADAC explanation codes
The NDC
- 00071-0007-24 · Parke-Davis Div of Pfizer Inc · $1.57665 per EA · eff. 2026-09-23 filed
Other strengths, forms and brands
3 other products in the NADAC file share the FDA nonproprietary name phenytoin with DILANTIN 50 MG INFATAB.
| Product | Pharmacies pay per unit | Medicare per unit |
|---|---|---|
| DILANTIN 50 MG INFATAB this page | $1.57665 per EA filed | We don’t know yet |
| PHENYTOIN 50 MG INFATAB CHEW | $0.20122 per EA filed | We don’t know yet |
| PHENYTOIN 50 MG TABLET CHEW | $0.20122 per EA filed | We don’t know yet |
| PHENYTOIN 125 MG/5 ML SUSP | $0.07485 per ML filed | We don’t know yet |
CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17
Compared with its class
Its NADAC price is $1.57665 per EA filed.
Of the 85 other products in FDA’s Anti-epileptic Agent class priced per EA, 40 have a higher middle NADAC price and 45 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
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 tablets? Is it lower than what I would pay through my insurance?
- Is a generic version available, and would it suit me? NADAC lists a generic with the same ingredient, strength and dosage form by FDA: PHENYTOIN 50 MG INFATAB CHEW. Ask your pharmacist or prescriber; do not switch on your own.
- These are questions about price, not medical advice. Do not change or stop a medicine without talking to your prescriber or pharmacist.
Related pages
Its pharmacologic class
Related in the same class
- GABAPENTIN 600 MG TABLET
- LAMOTRIGINE 25 MG DISPER TAB
- DIVALPROEX SOD ER 250 MG TAB
- PRIMIDONE 125 MG TABLET
- ZONISAMIDE 100 MG CAPSULE