Primidone 50 MG Oral Tablet — RxCUI 198150
RxNorm drug concept · Semantic clinical drug
RxCUI 198150
Semantic clinical drug · SCD
● Current RxNorm concept 41 FDA products
102 package NDCs
Snapshot Jul 14, 2026
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
RxCUI198150
Official namePrimidone 50 MG Oral Tablet
Concept typeSemantic clinical drug (SCD)
RxNorm statusCurrent RxNorm concept
FDA products mapped41
Package NDCs mapped102
Reported Medicaid activity (SDUD)100,705 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...
🕸️ Concept Web — How Primidone 50 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 50 MG Oral Tablet
RxCUI 198150 Semantic clinical drug · SCD
Every web starts here: one RxCUI, one fixed meaning in the RxNorm vocabulary.
-
Ingredients 1
The active substance itself — no strength, form, or brand attached yet.
-
Primidone
8691IN
-
Primidone
-
Brand names 1
The same medicine's trade names. A brand name alone says nothing about strength or form.
-
Mysoline
203011BN
-
Mysoline
-
Dose forms 9
The ingredient poured into a form — tablet, solution, cream — still without one fixed strength.
-
Primidone Oral Tablet
369489SCDF -
Primidone Oral Product
1161718SCDG -
Primidone Pill
1161719SCDG -
Primidone Oral Tablet [Mysoline]
368743SBDF -
Mysoline Oral Product
1176981SBDG -
Mysoline Pill
1176982SBDG -
Oral Tablet
317541DF -
Oral Product
1151131DFG - +1 more in this family
-
Primidone Oral Tablet
-
Clinical & branded drugs 3
Ingredient + strength + dose form. These are the concepts real FDA products actually carry.
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Primidone 50 MG
316588SCDC -
Primidone 50 MG Oral Tablet [Mysoline]
207478SBD -
Primidone 50 MG [Mysoline]
541930SBDC
-
Primidone 50 MG
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
SCDC · 316588 -
Primidone Oral Tablet
SCDF · 369489 -
Primidone Oral Product
SCDG · 1161718 -
Primidone Pill
SCDG · 1161719
Brand-Name Concepts
-
Primidone 50 MG Oral Tablet [Mysoline]
SBD · 207478 -
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
41 products · 102 package NDCs
102 package NDCs map to RxCUI 198150 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 |
| 00615-8206-39 | 30 TABLET in 1 BLISTER PACK (0615-8206-39) | Primidone | NCS HealthCare of KY, LLC dba Vangard Labs | 2018-04-05 |
| 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 |
| 62135-0468-90 | 90 TABLET in 1 BOTTLE (62135-468-90) | Primidone | Chartwell RX, LLC | 2023-04-11 |
| 63629-7811-01 | 30 TABLET in 1 BOTTLE (63629-7811-1) | Primidone | Bryant Ranch Prepack | 2018-10-23 |
| 63629-7811-02 | 90 TABLET in 1 BOTTLE (63629-7811-2) | Primidone | Bryant Ranch Prepack | 2019-03-19 |
| 63629-7811-03 | 60 TABLET in 1 BOTTLE (63629-7811-3) | Primidone | Bryant Ranch Prepack | 2024-04-03 |
| 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 |
| 71335-1965-01 | 30 TABLET in 1 BOTTLE, PLASTIC (71335-1965-1) | Primidone | Bryant Ranch Prepack | 2022-05-03 |
| 71335-1965-02 | 90 TABLET in 1 BOTTLE, PLASTIC (71335-1965-2) | Primidone | Bryant Ranch Prepack | 2021-10-04 |
Observed labelers:
Proficient Rx LP (14) ·
Aphena Pharma Solutions - Tennessee, LLC (13) ·
Dr. Reddy's Laboratories Limited (10) ·
Advagen Pharma Limited (8) ·
Amneal Pharmaceuticals LLC (6) ·
Amneal Pharmaceuticals of New York LLC (6)
· +14 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.
Reference information about drug-concept identifiers and public regulatory data — not medical advice. Talk to your pharmacist or prescriber about your own medication.