Dorzolamide HCl 2 % / timolol maleate 0.5 % Ophthalmic Solution
RxNorm 1923432

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 1923432 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: dorzolamide HCl 2 % / timolol maleate 0.5 % Ophthalmic Solution.

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

SCD
Dorzolamide 20 mg/ML / timolol 5 mg/ML Ophthalmic Solution
Primary clinical definition
AUI:12350373
View
PT
Dorzolamide (as dorzolamide hydrochloride) 20 mg/mL and timolol (as timolol maleate) 5 mg/mL eye drops
AUI:10297614
View
SY
Dorzolamide 2 % / timolol 0.5 % Ophthalmic Solution
AUI:2990481
View
SY
Dorzolamide 20 mg/ML (as dorzolamide HCl 22.26 mg/ML) / timolol 5 mg/ML (as timolol maleate 6.83 mg/ML) Ophthalmic Solution
AUI:5470321
View
PSN
Dorzolamide HCl 2 % / timolol maleate 0.5 % Ophthalmic Solution
AUI:6402054
View
FN
Product containing precisely dorzolamide (as dorzolamide hydrochloride) 20 mg/1 mL and timolol (as timolol maleate) 5 mg/1 mL conventional release eye drops (clinical drug)
AUI:10311761
View

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

SCDPrescribable

Semantic Clinical Drug (SCD):
Dorzolamide 20 mg/ML / timolol 5 mg/ML Ophthalmic Solution
(Atom ID: 12350373)

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
dorzolamide 20 MG/ML / timolol 5 MG/ML Ophthalmic Solution
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)
1923432
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
12350373
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SCD
Semantic Clinical Drug (Ingredient + Strength + Dose Form)
Source Code
1923432
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
{328229} 236065
RXCUI of BOSS Active Ingredient preceded by RXCUI of SCDC responsible for value
RXN AI
{328742} 10600
RXCUI of BOSS Active Ingredient preceded by RXCUI of SCDC responsible for value
RXN AM
{328229} 60207
RXCUI of BOSS Active Moiety preceded by RXCUI of SCDC responsible for value
RXN AM
{328742} 10600
RXCUI of BOSS Active Moiety preceded by RXCUI of SCDC responsible for value
RXN AVAILABLE STRENGTH
20 MG/ML / 5 MG/ML
Available drug strengths listed in the order of ingredients from the drug
RXN BOSS FROM
{328229} AM
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
{328742} 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
RXTERM FORM
Sol
The RxTerm dose form name for this drug
PTPrescribable

Designated preferred name (PT):
Dorzolamide (as dorzolamide hydrochloride) 20 mg/mL and timolol (as timolol maleate) 5 mg/mL eye drops
(Atom ID: 10297614)

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
Dorzolamide (as dorzolamide hydrochloride) 20 mg/mL and timolol (as timolol maleate) 5 mg/mL eye drops
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)
1923432
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
10297614
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
PT
Designated preferred name ()
Source Code
330734009
The "Most useful" identifier asserted by the original source vocabulary.

Source & Registry Data

Source Name
US Edition of SNOMED CT (SNOMEDCT_US)
The official name and abbreviation for the vocabulary source.
Source Version
2026_01_31
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
National Library Of Medicine, NLM is a Charter Member of SNOMED International on behalf of the U.S., National Library of Medicine, 8600 Rockville Pike, , Bethesda, MD, United States, 20894, 1-888-FIND-NLM (1-888-346-3656), , https://support.nlm.nih.gov/support/create-case/,
Source licensing contact information.
SYPrescribable

Synonym (SY):
Dorzolamide 2 % / timolol 0.5 % Ophthalmic Solution
(Atom ID: 2990481)

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
dorzolamide 2 % / timolol 0.5 % Ophthalmic Solution
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)
1923432
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
2990481
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SY
Synonym (Synonym of another TTY, given for clarity.)
Source Code
1923432
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):
Dorzolamide 20 mg/ML (as dorzolamide HCl 22.26 mg/ML) / timolol 5 mg/ML (as timolol maleate 6.83 mg/ML) Ophthalmic Solution
(Atom ID: 5470321)

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
dorzolamide 20 MG/ML (as dorzolamide HCl 22.26 MG/ML) / timolol 5 MG/ML (as timolol maleate 6.83 MG/ML) Ophthalmic Solution
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)
1923432
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
5470321
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SY
Synonym (Synonym of another TTY, given for clarity.)
Source Code
1923432
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):
Dorzolamide HCl 2 % / timolol maleate 0.5 % Ophthalmic Solution
(Atom ID: 6402054)

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
dorzolamide HCl 2 % / timolol maleate 0.5 % Ophthalmic Solution
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)
1923432
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6402054
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
1923432
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.
FNPrescribable

Full form of descriptor (FN):
Product containing precisely dorzolamide (as dorzolamide hydrochloride) 20 mg/1 mL and timolol (as timolol maleate) 5 mg/1 mL conventional release eye drops (clinical drug)
(Atom ID: 10311761)

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
Product containing precisely dorzolamide (as dorzolamide hydrochloride) 20 milligram/1 milliliter and timolol (as timolol maleate) 5 milligram/1 milliliter conventional release eye drops (clinical drug)
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)
1923432
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
10311761
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
FN
Full form of descriptor ()
Source Code
330734009
The "Most useful" identifier asserted by the original source vocabulary.

Source & Registry Data

Source Name
US Edition of SNOMED CT (SNOMEDCT_US)
The official name and abbreviation for the vocabulary source.
Source Version
2026_01_31
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
National Library Of Medicine, NLM is a Charter Member of SNOMED International on behalf of the U.S., National Library of Medicine, 8600 Rockville Pike, , Bethesda, MD, United States, 20894, 1-888-FIND-NLM (1-888-346-3656), , https://support.nlm.nih.gov/support/create-case/,
Source licensing contact information.

Patient Education

Dorzolamide and Timolol Ophthalmic


The combination of dorzolamide and timolol is used to treat eye conditions, including glaucoma and ocular hypertension, in which increased pressure can lead to a gradual loss of vision. Dorzolamide and timolol is used for patients whose eye condition has not responded to another medication. Dorzolamide is in a class of medications called topical carbonic anhydrase inhibitors. Timolol is in a class of medications called topical beta blockers. Dorzolamide and timolol lowers pressure in the eye by decreasing the production of natural fluids in the eye.
[Learn More]


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