Methylnaltrexone bromide 20 mg/ML
RxNorm 979112

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 979112 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 bromide 20 mg/ML.

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

SCDC
Methylnaltrexone bromide 20 mg/ML
AUI:12282883
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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.

SCDCPrescribable

Semantic Clinical Drug Component (SCDC):
Methylnaltrexone bromide 20 mg/ML
(Atom ID: 12282883)

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 bromide 20 MG/ML
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)
979112
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
12282883
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SCDC
Semantic Clinical Drug Component (Ingredient + Strength)
Source Code
979112
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.

Technical Attributes & Logic

RXN BOSS STRENGTH DENOM UNIT
ML
RXN Boss Strength Denom Unit
RXN BOSS STRENGTH DENOM VALUE
1
RXN Boss Strength Denom Value
RXN BOSS STRENGTH NUM UNIT
MG
RXN Boss Strength Num Unit
RXN BOSS STRENGTH NUM VALUE
20
RXN Boss Strength Num Value
RXN IN EXPRESSED FLAG
P
Strength Expressed As Precise Flag
RXN STRENGTH
20 MG/ML
Strength plus unit of SCDC

Patient Education

Methylnaltrexone Injection


Methylnaltrexone injection is used to treat constipation caused by opioid (narcotic) pain medications in people with chronic (on-going) pain that is not caused by cancer but may be related to a previous cancer or cancer treatment. It is also used to treat constipation caused by opioid pain medications in people with an advanced illness or for active cancer pain. Methylnaltrexone injection 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.
[Learn More]


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