Tasimelteon Oral Capsule [Hetlioz]
RxNorm 1491621

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 1491621 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: tasimelteon Oral Capsule [Hetlioz].

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

SBDF
Tasimelteon Oral Capsule [Hetlioz]
AUI:5948319
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SBDFPrescribable

Semantic Branded Drug Form (SBDF):
Tasimelteon Oral Capsule [Hetlioz]
(Atom ID: 5948319)

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
tasimelteon Oral Capsule [Hetlioz]
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)
1491621
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
5948319
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SBDF
Semantic Branded Drug Form (Ingredient + Dose Form + Brand Name)
Source Code
1491621
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

Tasimelteon


Tasimelteon is used to treat non-24-hour sleep-wake disorder (non-24; a condition that occurs mainly in people who are blind in which the body's natural clock is out of sync with the normal day-night cycle and causes a disrupted sleep schedule) in adults. It is also used to treat nighttime sleep problems in adults and children 3 years of age and older with Smith-Magenis Syndrome (SMS; a developmental disorder). Tasimelteon is in a class of medications called melatonin receptor agonists. It works similarly to melatonin, a natural substance in the brain that is needed for sleep.
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