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 717× 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 -0.4% WoW · of 33 NDCs
Market Price Trend
Monthly average NADAC per unit, split by generic and brand.
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 $0.0916 to $65.6886 per EA — the most expensive product costs about 717× the cheapest.
Is generic Primidone cheaper than brand?
The average generic NADAC for Primidone is $0.1898 per EA, versus $38.6166 for brand-labeled products — brand versions average about 204× 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, 16 Primidone NDCs rose and 11 fell, with a market-wide average change of -0.4%.