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Primidone 250 MG Oral Tablet — RxCUI 96304

RxNorm drug concept · Semantic clinical drug
RxCUI 96304 Semantic clinical drug · SCD ● Current RxNorm concept 34 FDA products 81 package NDCs Snapshot Jul 14, 2026

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Compiled from public NLM RxNorm and FDA (openFDA NDC directory) data sources. Editorial policy

What you’re looking at: the standardized identity of one medicine, as the U.S. drug-data system sees it. Below — every FDA-listed product, package code, price benchmark, and billing code that maps to it.

🗂️ Key Facts

RxCUI96304
Official namePrimidone 250 MG Oral Tablet
Concept typeSemantic clinical drug (SCD)
RxNorm statusCurrent RxNorm concept
FDA products mapped34
Package NDCs mapped81
Reported Medicaid activity (SDUD)100,772 prescriptions · 50 state & territory Medicaid programs · latest period Q4 2025
RxNorm release07/06/2026
Snapshot dataJul 14, 2026

📖 Skip the Codes — Read It in Plain English.

Our pharmacist-built guide to Primidone: what it is, how it’s used, side effects, and interactions.

📗 Our plain-language guide HelloPharmacist
  • Primidone is a seizure medicine — an anticonvulsant. It's used to control several types of epileptic seizures, including grand mal (major convulsions), psychomotor seizures, and fo...
  • Starting low and increasing gradually gives your body time to adjust. The most common early side effects — dizziness, unsteadiness, and nausea — tend to be much milder when the dos...
  • Why do I have to start at such a low dose and build up slowly?
  • Please don't stop suddenly without talking to your doctor first. Stopping an anticonvulsant abruptly can trigger a prolonged, dangerous seizure called status epilepticus — that's a...
📖 Read our full Primidone guide →

🕸️ Concept Web — How Primidone 250 MG Oral Tablet Connects

One RxCUI never lives alone. Follow the path from the raw ingredient down to the exact strength-and-form concepts FDA products carry — every stop is a real RxNorm concept with its own identifier. Hover or focus any chip for what it means.
This page's concept Primidone 250 MG Oral Tablet RxCUI 96304

Every web starts here: one RxCUI, one fixed meaning in the RxNorm vocabulary.

  1. Ingredients 1

    The active substance itself — no strength, form, or brand attached yet.

    • Primidone 8691
  2. Brand names 1

    The same medicine's trade names. A brand name alone says nothing about strength or form.

    • Mysoline 203011
  3. Dose forms 9

    The ingredient poured into a form — tablet, solution, cream — still without one fixed strength.

    • Primidone Oral Tablet 369489
    • Primidone Oral Product 1161718
    • Primidone Pill 1161719
    • Primidone Oral Tablet [Mysoline] 368743
    • Mysoline Oral Product 1176981
    • Mysoline Pill 1176982
    • Oral Tablet 317541
    • Oral Product 1151131
    • +1 more in this family
  4. Clinical & branded drugs 3

    Ingredient + strength + dose form. These are the concepts real FDA products actually carry.

Showing up to 8 concepts per family — 13 of 14 stored related concepts drawn.
These are official RxNorm vocabulary relationships — how concepts name and organize the same medicine. They do not establish therapeutic equivalence or substitutability: two concepts appearing in one web is never a statement that products can be swapped.

🔀 Generic ⇄ Brand Crosswalk

The same medicine has an unbranded (generic) identity and one or more brand-name identities — each with its own RxCUI. This is a naming relationship in RxNorm, not a statement that any two products are substitutable.

Generic (Clinical) Concepts

  • Primidone 250 MG SCDC · 316587
  • Primidone Oral Tablet SCDF · 369489
  • Primidone Oral Product SCDG · 1161718
  • Primidone Pill SCDG · 1161719

Brand-Name Concepts

  • Primidone 250 MG Oral Tablet [Mysoline] SBD · 201747
  • Primidone 250 MG [Mysoline] SBDC · 565996
  • Primidone Oral Tablet [Mysoline] SBDF · 368743
  • Mysoline Oral Product SBDG · 1176981
  • Mysoline Pill SBDG · 1176982
  • Mysoline BN · 203011

📦 FDA Products & Package NDCs

34 products · 81 package NDCs
81 package NDCs map to RxCUI 96304 in the current snapshot — up to 50 per page. Each linked NDC opens its full package page.
Package NDC Package Brand / generic name Labeler Marketing start
00527-1231-01 100 TABLET in 1 BOTTLE (0527-1231-01) Primidone Lannett Company, Inc. 1978-12-01
00527-1231-05 500 TABLET in 1 BOTTLE (0527-1231-05) Primidone Lannett Company, Inc. 1978-12-01
00527-1231-10 1000 TABLET in 1 BOTTLE (0527-1231-10) Primidone Lannett Company, Inc. 1978-12-01
00527-1301-01 100 TABLET in 1 BOTTLE (0527-1301-01) Primidone Lannett Company, Inc. 2001-05-24
00527-1301-05 500 TABLET in 1 BOTTLE (0527-1301-05) Primidone Lannett Company, Inc. 2001-05-24
00527-1301-10 1000 TABLET in 1 BOTTLE (0527-1301-10) Primidone Lannett Company, Inc. 2001-05-24
00591-5321-01 100 TABLET in 1 BOTTLE, PLASTIC (0591-5321-01) Primidone Actavis Pharma, Inc. 2010-06-19
42291-0509-50 500 TABLET in 1 BOTTLE (42291-509-50) Primidone AvKARE 2022-03-22
42291-0511-01 100 TABLET in 1 BOTTLE (42291-511-01) Primidone AvKARE 2022-03-22
50268-0686-15 50 BLISTER PACK in 1 BOX, UNIT-DOSE (50268-686-15) / 1 TABL... Primidone AvPAK 2011-05-19
50268-0687-15 50 BLISTER PACK in 1 BOX, UNIT-DOSE (50268-687-15) / 1 TABL... Primidone AvPAK 2011-05-19
51407-0637-01 100 TABLET in 1 BOTTLE (51407-637-01) Primidone Golden State Medical Supply, Inc 2022-02-03
51407-0637-05 500 TABLET in 1 BOTTLE (51407-637-05) Primidone Golden State Medical Supply, Inc 2022-02-03
51407-0638-01 100 TABLET in 1 BOTTLE (51407-638-01) Primidone Golden State Medical Supply, Inc 2022-02-03
53746-0544-01 100 TABLET in 1 BOTTLE (53746-544-01) Primidone Amneal Pharmaceuticals of New York LLC 2009-12-24
53746-0544-05 500 TABLET in 1 BOTTLE (53746-544-05) Primidone Amneal Pharmaceuticals of New York LLC 2009-12-24
53746-0544-10 1000 TABLET in 1 BOTTLE (53746-544-10) Primidone Amneal Pharmaceuticals of New York LLC 2009-12-24
53746-0545-01 100 TABLET in 1 BOTTLE (53746-545-01) Primidone Amneal Pharmaceuticals of New York LLC 2009-12-24
53746-0545-05 500 TABLET in 1 BOTTLE (53746-545-05) Primidone Amneal Pharmaceuticals of New York LLC 2009-12-24
53746-0545-10 1000 TABLET in 1 BOTTLE (53746-545-10) Primidone Amneal Pharmaceuticals of New York LLC 2009-12-24
55111-0476-01 100 TABLET in 1 BOTTLE (55111-476-01) Primidone Dr. Reddy's Laboratories Limited 2008-10-03
55111-0476-05 500 TABLET in 1 BOTTLE (55111-476-05) Primidone Dr. Reddy's Laboratories Limited 2008-10-03
55111-0476-30 30 TABLET in 1 BOTTLE (55111-476-30) Primidone Dr. Reddy's Laboratories Limited 2008-10-03
55111-0476-60 60 TABLET in 1 BOTTLE (55111-476-60) Primidone Dr. Reddy's Laboratories Limited 2008-10-03
55111-0476-78 10 BLISTER PACK in 1 CARTON (55111-476-78) / 10 TABLET in 1... Primidone Dr. Reddy's Laboratories Limited 2008-10-03
55111-0477-01 100 TABLET in 1 BOTTLE (55111-477-01) Primidone Dr. Reddy's Laboratories Limited 2008-10-03
55111-0477-05 500 TABLET in 1 BOTTLE (55111-477-05) Primidone Dr. Reddy's Laboratories Limited 2008-10-03
55111-0477-30 30 TABLET in 1 BOTTLE (55111-477-30) Primidone Dr. Reddy's Laboratories Limited 2008-10-03
55111-0477-60 60 TABLET in 1 BOTTLE (55111-477-60) Primidone Dr. Reddy's Laboratories Limited 2008-10-03
55111-0477-78 10 BLISTER PACK in 1 CARTON (55111-477-78) / 10 TABLET in 1... Primidone Dr. Reddy's Laboratories Limited 2008-10-03
65162-0544-10 100 TABLET in 1 BOTTLE (65162-544-10) Primidone Amneal Pharmaceuticals LLC 2009-12-24
65162-0544-11 1000 TABLET in 1 BOTTLE (65162-544-11) Primidone Amneal Pharmaceuticals LLC 2009-12-24
65162-0544-50 500 TABLET in 1 BOTTLE (65162-544-50) Primidone Amneal Pharmaceuticals LLC 2009-12-24
65162-0545-10 100 TABLET in 1 BOTTLE (65162-545-10) Primidone Amneal Pharmaceuticals LLC 2009-12-24
65162-0545-11 1000 TABLET in 1 BOTTLE (65162-545-11) Primidone Amneal Pharmaceuticals LLC 2009-12-24
65162-0545-50 500 TABLET in 1 BOTTLE (65162-545-50) Primidone Amneal Pharmaceuticals LLC 2009-12-24
66490-0690-10 100 TABLET in 1 BOTTLE (66490-690-10) Mysoline Bausch Health US, LLC 2009-06-24
66490-0691-10 100 TABLET in 1 BOTTLE (66490-691-10) Mysoline Bausch Health US, LLC 2009-06-24
68084-0202-01 100 BLISTER PACK in 1 BOX, UNIT-DOSE (68084-202-01) / 1 TAB... Primidone American Health Packaging 2007-09-05
68084-0203-01 100 BLISTER PACK in 1 BOX, UNIT-DOSE (68084-203-01) / 1 TAB... Primidone American Health Packaging 2007-09-17
69584-0684-10 100 TABLET in 1 BOTTLE, PLASTIC (69584-684-10) Primidone Oxford Pharmaceuticals, LLC 2021-02-22
69584-0684-50 500 TABLET in 1 BOTTLE, PLASTIC (69584-684-50) Primidone Oxford Pharmaceuticals, LLC 2021-02-22
69584-0685-10 100 TABLET in 1 BOTTLE, PLASTIC (69584-685-10) Primidone Oxford Pharmaceuticals, LLC 2021-02-22
69584-0685-50 500 TABLET in 1 BOTTLE (69584-685-50) Primidone Oxford Pharmaceuticals, LLC 2021-02-22
72603-0609-01 100 TABLET in 1 BOTTLE (72603-609-01) Primidone NorthStar Rx LLC 2025-05-01
72603-0609-02 500 TABLET in 1 BOTTLE (72603-609-02) Primidone NorthStar Rx LLC 2025-05-01
72603-0610-01 100 TABLET in 1 BOTTLE (72603-610-01) Primidone NorthStar Rx LLC 2025-05-01
72789-0177-01 100 TABLET in 1 BOTTLE, PLASTIC (72789-177-01) Primidone PD-Rx Pharmaceuticals, Inc. 2021-03-30
72789-0177-30 30 TABLET in 1 BOTTLE, PLASTIC (72789-177-30) Primidone PD-Rx Pharmaceuticals, Inc. 2023-07-28
72789-0177-82 500 TABLET in 1 BOTTLE, PLASTIC (72789-177-82) Primidone PD-Rx Pharmaceuticals, Inc. 2021-06-22
Observed labelers: Proficient Rx LP (14) · Dr. Reddy's Laboratories Limited (10) · Advagen Pharma Limited (8) · Amneal Pharmaceuticals LLC (6) · Amneal Pharmaceuticals of New York LLC (6) · Carnegie Pharmaceuticals LLC (6) · +10 more — this is the FDA-listed mapping footprint, not sales, inventory, availability, or market share.

🗃️ Sources & Limits

Atlas generation902fddb9-e9c1-4004-bf4c-dba4d51037c7
openFDA export observedJul 14, 2026
RxNorm release07/06/2026
Methodology2026-07-full-catalog-v1
  • A shared RxCUI does not prove interchangeability. Products mapped to the same concept are not thereby equivalent or substitutable — equivalence is a separate, product-level determination.
  • Listing here does not establish approval or coverage. Appearing in this snapshot is a data observation, not an FDA approval status or a payer coverage decision.
  • Missing data never means zero. A silent dataset (no price, no billing code, no utilization) means no observation — not that the real-world value is zero.
  • Counts describe the mapping footprint. Product, package, and labeler counts are the FDA-listed mapping footprint in this snapshot — not sales, inventory, availability, or market share.
This product uses publicly available data from the U.S. National Library of Medicine (NLM), National Institutes of Health, Department of Health and Human Services; NLM is not responsible for the product and does not endorse or recommend this or any other product.

Machine-readable JSON

Reference information about drug-concept identifiers and public regulatory data — not medical advice. Talk to your pharmacist or prescriber about your own medication.