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Primidone 50 MG Oral Tablet [Mysoline] — RxCUI 207478

RxNorm drug concept · Semantic branded drug
RxCUI 207478 Semantic branded drug · SBD ● Current RxNorm concept 2 FDA products 2 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

RxCUI207478
Official namePrimidone 50 MG Oral Tablet [Mysoline]
Concept typeSemantic branded drug (SBD)
RxNorm statusCurrent RxNorm concept
Also known asMysoline 50 MG Oral Tablet
FDA products mapped2
Package NDCs mapped2
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 50 MG Oral Tablet [Mysoline] 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 50 MG Oral Tablet [Mysoline] RxCUI 207478

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 50 MG Oral Tablet SCD · 198150
  • Primidone 50 MG SCDC · 316588
  • Primidone Oral Tablet SCDF · 369489
  • Primidone Oral Product SCDG · 1161718
  • Primidone Pill SCDG · 1161719

Brand-Name Concepts

  • Primidone 50 MG [Mysoline] SBDC · 541930
  • Primidone Oral Tablet [Mysoline] SBDF · 368743
  • Mysoline Oral Product SBDG · 1176981
  • Mysoline Pill SBDG · 1176982
  • Mysoline BN · 203011

📦 FDA Products & Package NDCs

2 products · 2 package NDCs
2 package NDCs map to RxCUI 207478 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
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
Observed labelers: Bausch Health US, LLC (2) — 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.