Phenytoin Oral Suspension
RxNorm 373438

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 373438 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: phenytoin Oral Suspension.

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

SCDF
Phenytoin Oral Suspension
AUI:12257890
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SCDFPrescribable

Semantic Clinical Drug Form (SCDF):
Phenytoin Oral Suspension
(Atom ID: 12257890)

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
phenytoin Oral Suspension
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)
373438
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
12257890
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SCDF
Semantic Clinical Drug Form (Ingredient + Dose Form)
Source Code
373438
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

Phenytoin


Phenytoin is used to control certain type of seizures, and to treat and prevent seizures that may begin during or after surgery to the brain or nervous system. Phenytoin is in a class of medications called anticonvulsants. It works by decreasing abnormal electrical activity in the brain.
[Learn More]


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