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Primidone 250 MG Oral Tablet [Mysoline] — RxCUI 201747

RxNorm drug concept · Semantic branded drug
RxCUI 201747 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

RxCUI201747
Official namePrimidone 250 MG Oral Tablet [Mysoline]
Concept typeSemantic branded drug (SBD)
RxNorm statusCurrent RxNorm concept
Also known asMysoline 250 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 helps control certain epileptic seizures: grand mal, psychomotor, and focal seizures. You can take it alone or with other seizure medicines. It may also help grand mal se...
  • You swallow the tablets by mouth. Your doctor will usually start you on a small bedtime dose and increase it over about 10 days. After that you take it in divided doses through the...
  • Early on, many people feel dizzy or unsteady. This often fades with time or a lower starting dose. Nausea, tiredness, drowsiness, double vision, and irritability can also happen. T...
  • No. Stopping suddenly can trigger status epilepticus, a prolonged and dangerous seizure. If you want to stop or change your dose, talk to your doctor first so it can be done safely...
📖 Read our full Primidone guide →

🕸️ Concept Web — How Primidone 250 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 250 MG Oral Tablet [Mysoline] RxCUI 201747

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 Oral Tablet SCD · 96304
  • 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 [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

2 products · 2 package NDCs
2 package NDCs map to RxCUI 201747 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.