Product Information
DILANTIN 50 MG INFATAB is a brand (anda) product labeled by Pfizer Inc., priced at $1.5767 per EA under NDC 00071000724. Its NADAC has been published 656 times since Nov 28, 2013.
FDA first approved this application before 1982. Its Orange Book therapeutic-equivalence code is AB — FDA rates it therapeutically equivalent to (substitutable for) its reference product.
The High Outlier badge above means this manufacturer's average price in the Phenytoin market falls above Q3 + 1.5·IQR across all competing manufacturers. We only apply this flag in markets with four or more competitors. Full definition: glossary → outlier.
Strength
50 mg/1
Manufacturer
Pfizer Inc.NDC
00071000724
Classification
Brand (ANDA)
Dosage Form
TABLET, CHEWABLE
Route
ORAL
Effective Date
8/19/2026
Active Ingredients
PHENYTOINApproval Type
Generic (ANDA)
FDA Application
ANDA084427FDA Approved
Before 1982
TE Code
AB
On Market Since
2/26/1979
Pharmacological Classes
Price Statistics
The NADAC for DILANTIN 50 MG INFATAB has been published 656 times since Nov 28, 2013, and over the history we have for it it has risen 199.5%. The table below summarizes its recorded NADAC range and movement.
| Current price | $1.5767 per EA |
|---|---|
| All-time high | $1.5818 (May 13, 2026) |
| All-time low | $0.5264 (Nov 28, 2013) |
| 52-week high | $1.5818 |
| 52-week low | $1.5049 |
| Median price | $1.2210 |
| Average price | $1.1474 |
| Largest weekly change | +20.0% (Jan 6, 2016) |
| Weeks tracked | 656 |
| Tracking since | Nov 28, 2013 |
Generic Alternatives
The matcher finds 5 manufacturers offering a NADAC-published product with this drug's active ingredient and strength in a comparable dosage form (cheapest from each manufacturer, up to 10 shown below). Switching to the cheapest would cut per-unit acquisition cost by roughly 89% at current NADAC. These are candidates to verify clinically, not guaranteed substitutes — see our generic drug prices guide.
Related Drugs
Same classification
Frequently asked questions
What is the NADAC price of DILANTIN 50 MG INFATAB?
The current National Average Drug Acquisition Cost (NADAC) for DILANTIN 50 MG INFATAB, manufactured by Pfizer Inc., is $1.5767 per EA (NDC 00071000724), effective Aug 19, 2026.
How has the price of DILANTIN 50 MG INFATAB changed over time?
Over the history we have for it, the NADAC for DILANTIN 50 MG INFATAB has risen 199.5%. It has been tracked across 656 weekly CMS publications since Nov 28, 2013.
What are the highest and lowest recorded NADAC prices for DILANTIN 50 MG INFATAB?
Since Nov 28, 2013, the NADAC for DILANTIN 50 MG INFATAB has ranged from a low of $0.5264 (Nov 28, 2013) to a high of $1.5818 (May 13, 2026), with a median of $1.2210 per EA.
Are there cheaper alternatives to DILANTIN 50 MG INFATAB?
Yes. 5 manufacturers publish a NADAC-priced product with the same active ingredient and strength in a comparable dosage form. The lowest-priced option, PHENYTOIN 50 MG TABLET CHEW, is $0.1812 per EA — about 89% below DILANTIN 50 MG INFATAB.
Who manufactures DILANTIN 50 MG INFATAB?
DILANTIN 50 MG INFATAB (NDC 00071000724) is labeled by Pfizer Inc., and CMS classifies it as a brand (anda) product.