Acetaminophen 300 mg / chlorpheniramine maleate 2.5 mg / ePHEDrine HCl 18 mg / guaiFENesin 42 mg in 20 mL Oral Solution
RxNorm 2178934

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 2178934 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: acetaminophen 300 mg / chlorpheniramine maleate 2.5 mg / ePHEDrine HCl 18 mg / guaiFENesin 42 mg in 20 mL Oral Solution.

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

SCD
Acetaminophen 15 mg/ML / chlorpheniramine maleate 0.125 mg/ML / ephedrine hydrochloride 0.9 mg/ML / guaifenesin 2.1 mg/ML Oral Solution
Primary clinical definition
AUI:12335136
View
TMSY
Acetaminophen 15 mg/ML / chlorpheniramine maleate 0.125 mg/ML / ePHEDrine hydrochloride 0.9 mg/ML / guaiFENesin 2.1 mg/ML Oral Solution
AUI:12377655
View
PSN
Acetaminophen 300 mg / chlorpheniramine maleate 2.5 mg / ePHEDrine HCl 18 mg / guaiFENesin 42 mg in 20 mL Oral Solution
AUI:11430670
View
SY
APAP 15 mg/ML / Chlorpheniramine Maleate 0.125 mg/ML / Ephedrine Hydrochloride 0.9 mg/ML / Guaifenesin 2.1 mg/ML Oral Solution
AUI:11430671
View
TMSY
APAP 15 mg/ML / Chlorpheniramine Maleate 0.125 mg/ML / ePHEDrine Hydrochloride 0.9 mg/ML / guaiFENesin 2.1 mg/ML Oral Solution
AUI:11431200
View

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

SCD

Semantic Clinical Drug (SCD):
Acetaminophen 15 mg/ML / chlorpheniramine maleate 0.125 mg/ML / ephedrine hydrochloride 0.9 mg/ML / guaifenesin 2.1 mg/ML Oral Solution
(Atom ID: 12335136)

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
acetaminophen 15 MG/ML / chlorpheniramine maleate 0.125 MG/ML / ephedrine hydrochloride 0.9 MG/ML / guaifenesin 2.1 MG/ML Oral Solution
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)
2178934
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
12335136
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SCD
Semantic Clinical Drug (Ingredient + Strength + Dose Form)
Source Code
2178934
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
{2178926} 161
RXCUI of BOSS Active Ingredient preceded by RXCUI of SCDC responsible for value
RXN AI
{2178927} 142429
RXCUI of BOSS Active Ingredient preceded by RXCUI of SCDC responsible for value
RXN AI
{2178928} 91165
RXCUI of BOSS Active Ingredient preceded by RXCUI of SCDC responsible for value
RXN AI
{2178929} 5032
RXCUI of BOSS Active Ingredient preceded by RXCUI of SCDC responsible for value
RXN AM
{2178926} 161
RXCUI of BOSS Active Moiety preceded by RXCUI of SCDC responsible for value
RXN AM
{2178927} 2400
RXCUI of BOSS Active Moiety preceded by RXCUI of SCDC responsible for value
RXN AM
{2178928} 3966
RXCUI of BOSS Active Moiety preceded by RXCUI of SCDC responsible for value
RXN AM
{2178929} 5032
RXCUI of BOSS Active Moiety preceded by RXCUI of SCDC responsible for value
RXN BOSS FROM
{2178926} 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 BOSS FROM
{2178927} 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 BOSS FROM
{2178928} 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 BOSS FROM
{2178929} 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 OBSOLETED
06/30/2021
Date the RxNorm atom became obsolete
RXTERM FORM
Sol
The RxTerm dose form name for this drug
TMSY

Tall Man Lettering Synonym (TMSY):
Acetaminophen 15 mg/ML / chlorpheniramine maleate 0.125 mg/ML / ePHEDrine hydrochloride 0.9 mg/ML / guaiFENesin 2.1 mg/ML Oral Solution
(Atom ID: 12377655)

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
acetaminophen 15 MG/ML / chlorpheniramine maleate 0.125 MG/ML / ePHEDrine hydrochloride 0.9 MG/ML / guaiFENesin 2.1 MG/ML Oral Solution
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)
2178934
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
12377655
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
2178934
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.
PSN

Prescribable Name (PSN):
Acetaminophen 300 mg / chlorpheniramine maleate 2.5 mg / ePHEDrine HCl 18 mg / guaiFENesin 42 mg in 20 mL Oral Solution
(Atom ID: 11430670)

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
acetaminophen 300 MG / chlorpheniramine maleate 2.5 MG / ePHEDrine HCl 18 MG / guaiFENesin 42 MG in 20 mL Oral Solution
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)
2178934
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
11430670
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
2178934
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.
SY

Synonym (SY):
APAP 15 mg/ML / Chlorpheniramine Maleate 0.125 mg/ML / Ephedrine Hydrochloride 0.9 mg/ML / Guaifenesin 2.1 mg/ML Oral Solution
(Atom ID: 11430671)

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
APAP 15 MG/ML / Chlorpheniramine Maleate 0.125 MG/ML / Ephedrine Hydrochloride 0.9 MG/ML / Guaifenesin 2.1 MG/ML Oral Solution
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)
2178934
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
11430671
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SY
Synonym (Synonym of another TTY, given for clarity.)
Source Code
2178934
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.
TMSY

Tall Man Lettering Synonym (TMSY):
APAP 15 mg/ML / Chlorpheniramine Maleate 0.125 mg/ML / ePHEDrine Hydrochloride 0.9 mg/ML / guaiFENesin 2.1 mg/ML Oral Solution
(Atom ID: 11431200)

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
APAP 15 MG/ML / Chlorpheniramine Maleate 0.125 MG/ML / ePHEDrine Hydrochloride 0.9 MG/ML / guaiFENesin 2.1 MG/ML Oral Solution
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)
2178934
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
11431200
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
2178934
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.