Primidone
33 NDCs across 13 manufacturers|31 Generic,2 Brand
Primidone is used to treat partial epilepsies, tonic-clonic epilepsy and tremor, per the National Library of Medicine's MED-RT classification.
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The brand product was first FDA-approved before 1982, and the first generic was approved Jan 1, 1982. FDA's Orange Book lists 15 AB-rated (therapeutically equivalent) products for this ingredient. In 2024, Medicare Part D spent $46 million on Primidone across 1.4 million claims for 300,000 beneficiaries.
Primidone is available as 33 NDCs from 13 manufacturers (31 generic, 2 brand), with NADAC prices from $0.09 to $65.69 per EA — the most expensive product costs about 719× the cheapest. Every pack size and labeler in this drug market is compared side-by-side below.
Total NDCs
33
31G / 2B
Manufacturers
13
competing in market
Price Spread
$0.09 – $65.69
per EA
7d Activity
avg +1.4% WoW · of 33 NDCs
Market Price Trend
Monthly average NADAC per unit, split by generic and brand.
Explore this market from other angles
Move from the molecule page into the supplier, class, and trend views that create the strongest internal-link cluster for this market.
Top supplier
Lannett Company Inc. manufacturer profile
Open the supplier page for the manufacturer with the strongest footprint in this market.
Lead class
Anti-epileptic Agent class view
See how this market rolls up into the broader therapeutic class and compare other drugs in the same bucket.
Trend hub
Latest market trends
Move from this single molecule into the current cross-market mover and volatility view.
Guide
How to interpret NADAC
Review the benchmark methodology behind the prices and spreads shown on this market page.
Manufacturer Breakdown
13 manufacturers producing PRIMIDONE(3 pricing outliers)
Frequently Asked Questions
What is Primidone used to treat?
Primidone is used to treat partial epilepsies, tonic-clonic epilepsy and tremor, per the National Library of Medicine's MED-RT classification.
When did Primidone become available as a generic?
FDA approved the first generic Primidone (ANDA) on Jan 1, 1982. The Orange Book currently lists 15 AB-rated products for this ingredient, meaning FDA considers them therapeutically equivalent to the brand.
How much does Medicare spend on Primidone?
In 2024, Medicare Part D spent $46 million on Primidone across 1.4 million claims for 300,000 beneficiaries.
How many Primidone products are on the market?
The Primidone drug market contains 33 NDCs from 13 manufacturers — 31 generic and 2 brand products.
What is the price range for Primidone?
NADAC reference prices for Primidone range from $0.0914 to $65.6886 per EA — the most expensive product costs about 719× the cheapest.
Is generic Primidone cheaper than brand?
The average generic NADAC for Primidone is $0.1926 per EA, versus $38.6166 for brand-labeled products — brand versions average about 200× the generic price.
Which manufacturers make Primidone?
13 manufacturers list Primidone in NADAC. Ranked by number of NDCs, the largest are Lannett Company Inc. (4), Oxford Pharmaceuticals, LLC (4), Advagen Pharma Ltd. (4), Amneal Pharmaceuticals of New York LLC (3), NorthStar Rx LLC (3).
How has the price of Primidone changed recently?
Over the past 7 days, 12 Primidone NDCs rose and 15 fell, with a market-wide average change of +1.4%.