Amitriptyline / chlordiazepoxide Oral Tablet [Limbitrol]
RxNorm 856780

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 856780 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: amitriptyline / chlordiazepoxide Oral Tablet [Limbitrol].

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

SBDF
Amitriptyline / chlordiazepoxide Oral Tablet [Limbitrol]
AUI:12321058
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TMSY
Amitriptyline / chlordiazePOXIDE Oral Tablet [Limbitrol]
AUI:12379708
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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.

SBDF

Semantic Branded Drug Form (SBDF):
Amitriptyline / chlordiazepoxide Oral Tablet [Limbitrol]
(Atom ID: 12321058)

Clinical Status & Identity

Prescribable Status
NO (Reference)
Part of the RxNorm Current Prescribable Content subset including all drugs available for prescription in the USA.
Concept Description
amitriptyline / chlordiazepoxide Oral Tablet [Limbitrol]
Official description of the drug concept as defined in the source vocabulary.
Suppress Flag
O
N: Not suppressible | O: Obsolete | Y: Suppressed by editor | E: Unquantified non-prescribable drug.

Interoperability & Coding

Concept ID (RxCUI)
856780
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
12321058
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SBDF
Semantic Branded Drug Form (Ingredient + Dose Form + Brand Name)
Source Code
856780
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 OBSOLETED
06/25/2024
Date the RxNorm atom became obsolete
TMSY

Tall Man Lettering Synonym (TMSY):
Amitriptyline / chlordiazePOXIDE Oral Tablet [Limbitrol]
(Atom ID: 12379708)

Clinical Status & Identity

Prescribable Status
NO (Reference)
Part of the RxNorm Current Prescribable Content subset including all drugs available for prescription in the USA.
Concept Description
amitriptyline / chlordiazePOXIDE Oral Tablet [Limbitrol]
Official description of the drug concept as defined in the source vocabulary.
Suppress Flag
O
N: Not suppressible | O: Obsolete | Y: Suppressed by editor | E: Unquantified non-prescribable drug.

Interoperability & Coding

Concept ID (RxCUI)
856780
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
12379708
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
TMSY
Tall Man Lettering Synonym (Tall Man Lettering synonym of another TTY, given to distinguish between commonly confused drugs.)
Source Code
856780
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

Amitriptyline


Amitriptyline is used to treat symptoms of depression. Amitriptyline is in a class of medications called tricyclic antidepressants. It works by increasing the amounts of certain natural substances in the brain that are needed to maintain mental balance.
[Learn More]


Chlordiazepoxide


Chlordiazepoxide is used to relieve anxiety and to control agitation caused by alcohol withdrawal. Chlordiazepoxide is in a class of medications called benzodiazepines. It works by decreasing abnormal electrical activity in the brain.
[Learn More]


Antidepressants


Antidepressants are medicines that treat depression. Your doctor can prescribe them for you. They work to balance some of the natural chemicals in our brains. It may take several weeks for them to help. There are several types of antidepressants. You and your doctor may have to try a few before finding what works best for you.

Antidepressants may cause mild side effects that usually do not last long. These may include headache, nausea, sleep problems, restlessness, and sexual problems. Tell your doctor if you have any side effects. You should also let your doctor know if you take any other medicines, vitamins, or herbal supplements.

It is important to keep taking your medicines, even if you feel better. Do not stop taking your medicines without talking to your doctor. You often need to stop antidepressants gradually.

NIH: National Institute of Mental Health


[Learn More]


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