Ursodiol 400 mg
RxNorm 452500

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 452500 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: ursodiol 400 mg.

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

SCDC
Ursodiol 400 mg
AUI:12274683
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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):
Ursodiol 400 mg
(Atom ID: 12274683)

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
ursodiol 400 MG
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)
452500
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
12274683
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SCDC
Semantic Clinical Drug Component (Ingredient + Strength)
Source Code
452500
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 ACTIVATED
07/29/2020
Date the RxNorm atom was reactivated
RXN BOSS STRENGTH DENOM UNIT
1
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
400
RXN Boss Strength Num Value
RXN IN EXPRESSED FLAG
P
Strength Expressed As Precise Flag
RXN OBSOLETED
04/30/2020
Date the RxNorm atom became obsolete
RXN STRENGTH
400 MG
Strength plus unit of SCDC

Patient Education

Ursodiol


Ursodiol is used to dissolve gallstones in people who do not want surgery or cannot have surgery to remove gallstones. Ursodiol is also used to prevent the formation of gallstones in overweight people who are losing weight very quickly. Ursodiol is used to treat people with primary biliary cirrhosis (PBC; an autoimmune liver disease). Ursodiol is in a class of medications called gallstone dissolution agentss. It works by decreasing the production of cholesterol and by dissolving the cholesterol in bile to prevent stone formation and by decreasing toxic levels of bile acids that accumulate in primary biliary cirrhosis.
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