LaMICtal XR 100 mg 24HR Extended Release Oral Tablet
RxNorm 900145

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 900145 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: LaMICtal XR 100 mg 24HR Extended Release Oral Tablet.

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

SBD
24 HR lamotrigine 100 mg Extended Release Oral Tablet [Lamictal]
AUI:6351485
View
TMSY
24 HR lamoTRIgine 100 mg Extended Release Oral Tablet [LaMICtal]
AUI:6378320
View
SY
Lamictal 100 mg 24 HR Extended Release Oral Tablet
AUI:6357922
View
TMSY
LaMICtal 100 mg 24 HR Extended Release Oral Tablet
AUI:6376222
View
SY
Lamictal XR 100 mg 24 HR Extended Release Oral Tablet
AUI:6355291
View
TMSY
LaMICtal XR 100 mg 24 HR Extended Release Oral Tablet
AUI:6375553
View
PSN
LaMICtal XR 100 mg 24HR Extended Release Oral Tablet
AUI:6371207
View

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

SBDPrescribable

Semantic Branded Drug (SBD):
24 HR lamotrigine 100 mg Extended Release Oral Tablet [Lamictal]
(Atom ID: 6351485)

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
24 HR lamotrigine 100 MG Extended Release Oral Tablet [Lamictal]
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)
900145
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6351485
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SBD
Semantic Branded Drug (Ingredient + Strength + Dose Form + Brand Name)
Source Code
900145
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 AI
{316129} 28439
RXCUI of BOSS Active Ingredient preceded by RXCUI of SCDC responsible for value
RXN AM
{316129} 28439
RXCUI of BOSS Active Moiety preceded by RXCUI of SCDC responsible for value
RXN AVAILABLE STRENGTH
100 MG
Available drug strengths listed in the order of ingredients from the drug
RXN BOSS FROM
{316129} AI
Source of BOSS as either from the active ingredient (AI) or the active moiety (AM) preceded by RXCUI of SCDC responsible for value
RXN HUMAN DRUG
US
Drug available for use in Humans
RXN QUANTITY
24 HR
Normal Form quantity factor
TMSYPrescribable

Tall Man Lettering Synonym (TMSY):
24 HR lamoTRIgine 100 mg Extended Release Oral Tablet [LaMICtal]
(Atom ID: 6378320)

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
24 HR lamoTRIgine 100 MG Extended Release Oral Tablet [LaMICtal]
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)
900145
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6378320
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
900145
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.
SYPrescribable

Synonym (SY):
Lamictal 100 mg 24 HR Extended Release Oral Tablet
(Atom ID: 6357922)

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
Lamictal 100 MG 24 HR Extended Release Oral Tablet
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)
900145
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6357922
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SY
Synonym (Synonym of another TTY, given for clarity.)
Source Code
900145
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):
LaMICtal 100 mg 24 HR Extended Release Oral Tablet
(Atom ID: 6376222)

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
LaMICtal 100 MG 24 HR Extended Release Oral Tablet
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)
900145
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6376222
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
900145
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.
SYPrescribable

Synonym (SY):
Lamictal XR 100 mg 24 HR Extended Release Oral Tablet
(Atom ID: 6355291)

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
Lamictal XR 100 MG 24 HR Extended Release Oral Tablet
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)
900145
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6355291
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SY
Synonym (Synonym of another TTY, given for clarity.)
Source Code
900145
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):
LaMICtal XR 100 mg 24 HR Extended Release Oral Tablet
(Atom ID: 6375553)

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
LaMICtal XR 100 MG 24 HR Extended Release Oral Tablet
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)
900145
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6375553
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
900145
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):
LaMICtal XR 100 mg 24HR Extended Release Oral Tablet
(Atom ID: 6371207)

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
LaMICtal XR 100 MG 24HR Extended Release Oral Tablet
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)
900145
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6371207
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
900145
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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