LamoTRIgine 25 mg (21), 50 mg (7) 24HR Extended Release Oral Tablet 28 Count Pack
RxNorm 900983

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 900983 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: lamoTRIgine 25 mg (21), 50 mg (7) 24HR Extended Release Oral Tablet 28 Count Pack.

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

SY
21 lamotrigine 25 mg 24 HR Extended Release Oral Tablet / 7 lamotrigine 50 mg 24 HR Extended Release Oral Tablet Pack
AUI:6357627
View
TMSY
21 lamoTRIgine 25 mg 24 HR Extended Release Oral Tablet / 7 lamoTRIgine 50 mg 24 HR Extended Release Oral Tablet Pack
AUI:6378060
View
PSN
LamoTRIgine 25 mg (21), 50 mg (7) 24HR Extended Release Oral Tablet 28 Count Pack
AUI:8735788
View
GPCK
{21 (24 HR lamotrigine 25 mg Extended Release Oral Tablet) / 7 (24 HR lamotrigine 50 mg Extended Release Oral Tablet) } Pack
AUI:6350257
View
TMSY
{21 (24 HR lamoTRIgine 25 mg Extended Release Oral Tablet) / 7 (24 HR lamoTRIgine 50 mg Extended Release Oral Tablet) } Pack
AUI:6375727
View

This clinical crossover tool is designed for healthcare professionals, pharmacists, and data analysts to safely compare substitute products and manage medication interoperability.

SYPrescribable

Synonym (SY):
21 lamotrigine 25 mg 24 HR Extended Release Oral Tablet / 7 lamotrigine 50 mg 24 HR Extended Release Oral Tablet Pack
(Atom ID: 6357627)

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
21 lamotrigine 25 MG 24 HR Extended Release Oral Tablet / 7 lamotrigine 50 MG 24 HR Extended Release Oral Tablet Pack
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)
900983
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6357627
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SY
Synonym (Synonym of another TTY, given for clarity.)
Source Code
900983
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.
TMSYPrescribable

Tall Man Lettering Synonym (TMSY):
21 lamoTRIgine 25 mg 24 HR Extended Release Oral Tablet / 7 lamoTRIgine 50 mg 24 HR Extended Release Oral Tablet Pack
(Atom ID: 6378060)

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
21 lamoTRIgine 25 MG 24 HR Extended Release Oral Tablet / 7 lamoTRIgine 50 MG 24 HR Extended Release Oral Tablet Pack
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)
900983
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6378060
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
900983
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.
PSNPrescribable

Prescribable Name (PSN):
LamoTRIgine 25 mg (21), 50 mg (7) 24HR Extended Release Oral Tablet 28 Count Pack
(Atom ID: 8735788)

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
lamoTRIgine 25 MG (21), 50 MG (7) 24HR Extended Release Oral Tablet 28 Count Pack
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)
900983
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
8735788
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
PSN
Prescribable Name (Synonym of another TTY, given for clarity and for display purposes in electronic prescribing applications. Only one PSN per concept.)
Source Code
900983
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.
GPCKPrescribable

Generic Pack (GPCK):
{21 (24 HR lamotrigine 25 mg Extended Release Oral Tablet) / 7 (24 HR lamotrigine 50 mg Extended Release Oral Tablet) } Pack
(Atom ID: 6350257)

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
{21 (24 HR lamotrigine 25 MG Extended Release Oral Tablet) / 7 (24 HR lamotrigine 50 MG Extended Release Oral Tablet) } Pack
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)
900983
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6350257
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
GPCK
Generic Pack ({# (Ingredient + Strength + Dose Form) / # (Ingredient + Strength + Dose Form)} Pack)
Source Code
900983
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 HUMAN DRUG
US
Drug available for use in Humans
TMSYPrescribable

Tall Man Lettering Synonym (TMSY):
{21 (24 HR lamoTRIgine 25 mg Extended Release Oral Tablet) / 7 (24 HR lamoTRIgine 50 mg Extended Release Oral Tablet) } Pack
(Atom ID: 6375727)

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
{21 (24 HR lamoTRIgine 25 MG Extended Release Oral Tablet) / 7 (24 HR lamoTRIgine 50 MG Extended Release Oral Tablet) } Pack
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)
900983
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6375727
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
900983
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

Lamotrigine


Lamotrigine extended-release (long-acting) tablets are used with other medications to treat certain types of seizures in patients who have epilepsy. All types of lamotrigine tablets (tablets, orally disintegrating tablets, and chewable tablets) other than the extended-release tablets are used alone or with other medications to treat seizures in people who have epilepsy or Lennox-Gastaut syndrome (a disorder that causes seizures and often causes developmental delays). All types of lamotrigine tablets other than the extended-release tablets are also used to increase the time between episodes of depression, mania (frenzied or abnormally excited mood), and other abnormal moods in patients with bipolar I disorder (manic-depressive disorder; a disease that causes episodes of depression, episodes of mania, and other abnormal moods). Lamotrigine has not been shown to be effective when people experience the actual episodes of depression or mania, so other medications must be used to help people recover from these episodes. Lamotrigine is in a class of medications called anticonvulsants. It works by decreasing abnormal electrical activity in the brain.
[Learn More]


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