Istradefylline 20 mg [Nourianz]
RxNorm 2199022

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 2199022 represents a standardized clinical drug concept used for cross-system interoperability. This concept aggregates multiple Atom IDs (AUIs), which are specific naming variations and synonyms used across pharmaceutical databases to ensure accurate medication mapping for: istradefylline 20 mg [Nourianz].

The following semantic concepts and normalized strings are associated with this clinical entity:

SBDC
Istradefylline 20 mg [Nourianz]
AUI:11446572
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This clinical crossover tool is designed for healthcare professionals, pharmacists, and data analysts to safely compare substitute products and manage medication interoperability.

SBDCPrescribable

Semantic Branded Drug Component (SBDC):
Istradefylline 20 mg [Nourianz]
(Atom ID: 11446572)

Clinical Status & Identity

Prescribable Status
YES (Active)
Part of the RxNorm Current Prescribable Content subset including all drugs available for prescription in the USA.
Concept Description
istradefylline 20 MG [Nourianz]
Official description of the drug concept as defined in the source vocabulary.
Suppress Flag
N
N: Not suppressible | O: Obsolete | Y: Suppressed by editor | E: Unquantified non-prescribable drug.

Interoperability & Coding

Concept ID (RxCUI)
2199022
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
11446572
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SBDC
Semantic Branded Drug Component (Ingredient + Strength + Brand Name)
Source Code
2199022
The "Most useful" identifier asserted by the original source vocabulary.

Source & Registry Data

Source Name
RxNorm Vocabulary (RXNORM)
The official name and abbreviation for the vocabulary source.
Source Version
20AA_260601F
The specific version of the vocabulary provided by the source.
Update Date
June 01, 2026
The date when this RxNorm data was last updated by the NLM.
License Contact
RxNorm Customer Service, , U.S. National Library of Medicine, 8600 Rockville Pike, , Bethesda, MD, United States, 20894, (888) FIND-NLM, , https://support.nlm.nih.gov/support/create-case/, https://www.nlm.nih.gov/research/umls/rxnorm/
Source licensing contact information.

Patient Education

Istradefylline


Istradefylline is used along with the combination of levodopa and carbidopa (Duopa, Rytary, Sinemet, others) to treat "off" episodes (times of difficulty moving, walking, and speaking that may happen as medication wears off or at random) in people with Parkinson's disease (PD; a disorder of the nervous system that causes difficulties with movement, muscle control, and balance). Istradefylline is in a class of medications called adenosine receptor antagonists. It works by changing the activity of certain natural substances in the brain.
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