Methylnaltrexone Oral Tablet [Relistor]
RxNorm 1801516

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 1801516 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: methylnaltrexone Oral Tablet [Relistor].

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

SBDF
Methylnaltrexone Oral Tablet [Relistor]
AUI:8238252
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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.

SBDFPrescribable

Semantic Branded Drug Form (SBDF):
Methylnaltrexone Oral Tablet [Relistor]
(Atom ID: 8238252)

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
methylnaltrexone Oral Tablet [Relistor]
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)
1801516
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
8238252
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SBDF
Semantic Branded Drug Form (Ingredient + Dose Form + Brand Name)
Source Code
1801516
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

Methylnaltrexone


Methylnaltrexone is used to treat constipation caused by opioid (narcotic) pain medications in people with chronic (ongoing) pain that is not caused by cancer but may be related to a previous cancer or cancer treatment. Methylnaltrexone is in a class of medications called peripherally acting mu-opioid receptor antagonists. It works by protecting the bowel from the effects of opioid (narcotic) medications.
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