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Methyldopa 500 MG Oral Tablet — RxCUI 197958

RxNorm drug concept · Semantic clinical drug
RxCUI 197958 Semantic clinical drug · SCD ● Current RxNorm concept 4 FDA products 6 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

RxCUI197958
Official nameMethyldopa 500 MG Oral Tablet
Concept typeSemantic clinical drug (SCD)
RxNorm statusCurrent RxNorm concept
FDA products mapped4
Package NDCs mapped6
Reported Medicaid activity (SDUD)282 prescriptions · 5 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 Methyldopa: what it is, how it’s used, side effects, and interactions.

📗 Our plain-language guide HelloPharmacist
  • Methyldopa is used to treat high blood pressure (hypertension). Keeping your blood pressure in a healthy range helps protect your heart, kidneys, and blood vessels over time. It ca...
  • Yes, drowsiness is the most common side effect, especially when you first start or when your dose goes up. The good news is that it often gets better after a few days. Your doctor...
  • Will methyldopa make me feel tired or drowsy?
  • Two rare but important ones to know about. First, methyldopa can affect your liver — if you notice yellowing of your skin or eyes, dark urine, or a fever especially in the first fe...
📖 Read our full Methyldopa guide →

🕸️ Concept Web — How Methyldopa 500 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 Methyldopa 500 MG Oral Tablet RxCUI 197958

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.

    • Methyldopa 6876
  2. Dose forms 6

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

    • Methyldopa Oral Tablet 372855
    • Methyldopa Oral Product 1162876
    • Methyldopa Pill 1162877
    • Oral Tablet 317541
    • Oral Product 1151131
    • Pill 1151133
  3. Clinical & branded drugs 1

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

    • Methyldopa 500 MG 317424

Showing up to 8 concepts per family — 8 of 8 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

  • Methyldopa 500 MG SCDC · 317424
  • Methyldopa Oral Tablet SCDF · 372855
  • Methyldopa Oral Product SCDG · 1162876
  • Methyldopa Pill SCDG · 1162877

📦 FDA Products & Package NDCs

4 products · 6 package NDCs
6 package NDCs map to RxCUI 197958 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
62135-0321-18 180 TABLET, FILM COATED in 1 BOTTLE (62135-321-18) Methyldopa Chartwell RX, LLC 2022-11-22
62135-0321-90 90 TABLET, FILM COATED in 1 BOTTLE (62135-321-90) Methyldopa Chartwell RX, LLC 2022-11-22
62135-0322-18 180 TABLET, FILM COATED in 1 BOTTLE (62135-322-18) Methyldopa Chartwell RX, LLC 2022-11-22
62135-0322-90 90 TABLET, FILM COATED in 1 BOTTLE (62135-322-90) Methyldopa Chartwell RX, LLC 2022-11-22
64980-0571-01 100 TABLET in 1 BOTTLE (64980-571-01) Methyldopa Rising Pharma Holdings, Inc. 2025-04-04
64980-0572-01 100 TABLET in 1 BOTTLE (64980-572-01) Methyldopa Rising Pharma Holdings, Inc. 2024-09-16
Observed labelers: Chartwell RX, LLC (4) · Rising Pharma Holdings, Inc. (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.