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Ethosuximide 250 MG Oral Capsule [Zarontin] — RxCUI 201737

RxNorm drug concept · Semantic branded drug
RxCUI 201737 Semantic branded drug · SBD ● Current RxNorm concept 1 FDA product 1 package NDC 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

RxCUI201737
Official nameEthosuximide 250 MG Oral Capsule [Zarontin]
Concept typeSemantic branded drug (SBD)
RxNorm statusCurrent RxNorm concept
Also known asZarontin 250 MG Oral Capsule
FDA products mapped1
Package NDCs mapped1
Reported Medicaid activity (SDUD)44 prescriptions · 1 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 Ethosuximide: what it is, how it’s used, side effects, and interactions.

📗 Our plain-language guide HelloPharmacist
  • An absence seizure is a brief episode — usually just a few seconds — where you or your child suddenly stares blankly and loses awareness, then snaps back as if nothing happened. Th...
  • What exactly is an absence seizure, and will ethosuximide stop them?
  • Ethosuximide comes as a capsule or a liquid solution, and you take it by mouth. Your doctor will start you on a lower dose and gradually increase it until your seizures are well co...
  • How do I take it, and does it matter if I take it with food?
📖 Read our full Ethosuximide guide →

🕸️ Concept Web — How Ethosuximide 250 MG Oral Capsule [Zarontin] 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 Ethosuximide 250 MG Oral Capsule [Zarontin] RxCUI 201737

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.

    • Ethosuximide 4135
  2. Brand names 1

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

    • Zarontin 202981
  3. Dose forms 9

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

    • Ethosuximide Oral Capsule 372108
    • Ethosuximide Oral Product 1157374
    • Ethosuximide Pill 1157375
    • Ethosuximide Oral Capsule [Zarontin] 366240
    • Zarontin Oral Product 1187043
    • Zarontin Pill 1187044
    • Oral Capsule 316965
    • 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

  • Ethosuximide 250 MG Oral Capsule SCD · 197682
  • Ethosuximide 250 MG SCDC · 315900
  • Ethosuximide Oral Capsule SCDF · 372108
  • Ethosuximide Oral Product SCDG · 1157374
  • Ethosuximide Pill SCDG · 1157375

Brand-Name Concepts

  • Ethosuximide 250 MG [Zarontin] SBDC · 565989
  • Ethosuximide Oral Capsule [Zarontin] SBDF · 366240
  • Zarontin Oral Product SBDG · 1187043
  • Zarontin Pill SBDG · 1187044
  • Zarontin BN · 202981

📦 FDA Products & Package NDCs

1 product · 1 package NDC
1 package NDC map to RxCUI 201737 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
00071-0237-24 100 CAPSULE in 1 BOTTLE (0071-0237-24) Zarontin Parke-Davis Div of Pfizer Inc 2000-09-22
Observed labelers: Parke-Davis Div of Pfizer Inc (1) — this is the FDA-listed mapping footprint, not sales, inventory, availability, or market share.

💲 Pricing (NADAC)

NADAC is CMS's National Average Drug Acquisition Cost — roughly what pharmacies pay to buy the drug. It is an acquisition benchmark, not your copay.
Per ea · median
$1.3086
Range $1.3086–$1.3086 · middle 50% $1.3086–$1.3086 · 1 NDCs
Latest compatible distributions from the CMS NADAC file · dataset watermark 2026-07-10. Prices vary by package and pharmacy; a distribution is shown instead of one misleading number. Rows the dataset is silent on carry no price. No zero-cost conclusion should be drawn.

🗃️ 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.