Product Information
PRIMIDONE 50 MG TABLET is a generic product labeled by Chartwell RX LLC, priced at $0.0914 per EA under NDC 62135046890. Its NADAC has been published 165 times since Aug 9, 2023.
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.
Strength
50 mg/1
Manufacturer
Chartwell RX LLCNDC
62135046890
Classification
Generic
Dosage Form
TABLET
Route
ORAL
Effective Date
9/23/2026
Active Ingredients
PRIMIDONEApproval Type
Generic (ANDA)
FDA Application
ANDA084903FDA Approved
Before 1982
TE Code
AB
On Market Since
5/24/2001
Pharmacological Classes
Price Statistics
The NADAC for PRIMIDONE 50 MG TABLET has been published 165 times since Aug 9, 2023, and over the history we have for it it has declined 34.8%. The table below summarizes its recorded NADAC range and movement.
| Current price | $0.0914 per EA |
|---|---|
| All-time high | $0.1437 (Feb 14, 2024) |
| All-time low | $0.0914 (Sep 23, 2026) |
| 52-week high | $0.1080 |
| 52-week low | $0.0914 |
| Median price | $0.1179 |
| Average price | $0.1170 |
| Largest weekly change | -22.9% (Nov 20, 2024) |
| Weeks tracked | 165 |
| Tracking since | Aug 9, 2023 |
Generic Alternatives
The matcher finds 10 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). None of the shown alternatives sit below the current price. These are candidates to verify clinically, not guaranteed substitutes — see our generic drug prices guide.
Related Drugs
Same classification
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Manufacturer
Chartwell RX LLC manufacturer profile
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Drug market
Primidone market comparison
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Therapeutic class
Anti-epileptic Agent class view
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Trend hub
Latest market trends
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Guide
Understanding NADAC pricing
Use the explainer when you need context on how CMS publishes NADAC and how to interpret the number on this page.
Frequently asked questions
What is the NADAC price of PRIMIDONE 50 MG TABLET?
The current National Average Drug Acquisition Cost (NADAC) for PRIMIDONE 50 MG TABLET, manufactured by Chartwell RX LLC, is $0.0914 per EA (NDC 62135046890), effective Sep 30, 2026.
How has the price of PRIMIDONE 50 MG TABLET changed over time?
Over the history we have for it, the NADAC for PRIMIDONE 50 MG TABLET has declined 34.8%. It has been tracked across 165 weekly CMS publications since Aug 9, 2023.
What are the highest and lowest recorded NADAC prices for PRIMIDONE 50 MG TABLET?
Since Aug 9, 2023, the NADAC for PRIMIDONE 50 MG TABLET has ranged from a low of $0.0914 (Sep 23, 2026) to a high of $0.1437 (Feb 14, 2024), with a median of $0.1179 per EA.
Are there cheaper alternatives to PRIMIDONE 50 MG TABLET?
10 manufacturers publish a NADAC-priced product with the same active ingredient and strength as PRIMIDONE 50 MG TABLET in a comparable dosage form, but none are currently priced below it.
Who manufactures PRIMIDONE 50 MG TABLET?
PRIMIDONE 50 MG TABLET (NDC 62135046890) is labeled by Chartwell RX LLC, and CMS classifies it as a generic product.