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Last Updated: March 27, 2026

CLINICAL TRIALS PROFILE FOR DORZOLAMIDE HYDROCHLORIDE; TIMOLOL MALEATE


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All Clinical Trials for dorzolamide hydrochloride; timolol maleate

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00108017 ↗ Comparison of the Effects of Two Glaucoma Drugs Over 24 Hours (0507A-137)(COMPLETED) Completed Merck Sharp & Dohme Corp. Phase 3 2005-04-01 This study is comparing 2 medications for glaucoma and how effective they are at controlling glaucoma over the course of an entire day.
NCT00273442 ↗ Assessing Cosopt Switch Patients Completed Pharmaceutical Research Network Phase 4 2005-11-01 To assess the safety and efficacy of a cohort of patients switched to the dorzolamide/timolol maleate fixed combination because they are insufficiently controlled on latanoprost monotherapy.
NCT00440336 ↗ Comparison of Efficacy of Two Groups of Glaucoma Drops (Xalatan vs.Cosopt) in Reducing Eye Pressure Following Laser (SLT)Treatment in the Management of Glaucoma. Unknown status Merck Sharp & Dohme Corp. N/A 2006-10-01 WHAT IS THIS STUDY ABOUT? Glaucoma and ocular hypertension are chronic eye diseases that can damage the optic nerve and lead to vision loss or blindness. The optic nerve acts like an electric cable with over a million wires. This nerve is responsible for carrying images from the eye to the brain. The way glaucoma and ocular hypertension cause blindness depends on many factors, but the most important factor is the increased pressure inside the eye (intraocular pressure). There is no cure for glaucoma or ocular hypertension. However, lowering the pressure inside the eye has been shown to slow the progression of disease. Intraocular pressure can be lowered by glaucoma medication, laser treatment, or surgery. You have open angle glaucoma, pseudoexfoliative glaucoma, or ocular hypertension. Researchers want to find out more about how 2 drugs called Cosopt (dorzolamide hydrochloride and timolol maleate) and Xalatan (latanoprost) can help people with these conditions. Cosopt and Xalatan are both eye drops that are approved by the U.S. Food and Drug Administration (FDA) to reduce intraocular pressure in people with open angle glaucoma and ocular hypertension. The study doctor will do a laser procedure called Selective Laser Trabeculoplasty (SLT) on people in this study to help lower their intraocular pressure. The FDA has approved SLT to treat open angle glaucoma and ocular hypertension. Then the study doctor will ask some participants to use either Cosopt or Xalatan, if their intraocular pressure is still too high 4 to 6 weeks after the SLT procedure. The study doctor wants to see which of the 2 study drugs (Cosopt or Xalatan) is better at reducing intraocular pressure after SLT. It is planned that about 30 people with glaucoma or ocular hypertension who are at least 18 years old will be in this study. Out of the participants whose intraocular pressure is still too high after SLT, half will use Cosopt and half will use Xalatan. You do not have to be in this study to have SLT or to use Cosopt or Xalatan.
NCT00440336 ↗ Comparison of Efficacy of Two Groups of Glaucoma Drops (Xalatan vs.Cosopt) in Reducing Eye Pressure Following Laser (SLT)Treatment in the Management of Glaucoma. Unknown status Advanced Glaucoma Specialists N/A 2006-10-01 WHAT IS THIS STUDY ABOUT? Glaucoma and ocular hypertension are chronic eye diseases that can damage the optic nerve and lead to vision loss or blindness. The optic nerve acts like an electric cable with over a million wires. This nerve is responsible for carrying images from the eye to the brain. The way glaucoma and ocular hypertension cause blindness depends on many factors, but the most important factor is the increased pressure inside the eye (intraocular pressure). There is no cure for glaucoma or ocular hypertension. However, lowering the pressure inside the eye has been shown to slow the progression of disease. Intraocular pressure can be lowered by glaucoma medication, laser treatment, or surgery. You have open angle glaucoma, pseudoexfoliative glaucoma, or ocular hypertension. Researchers want to find out more about how 2 drugs called Cosopt (dorzolamide hydrochloride and timolol maleate) and Xalatan (latanoprost) can help people with these conditions. Cosopt and Xalatan are both eye drops that are approved by the U.S. Food and Drug Administration (FDA) to reduce intraocular pressure in people with open angle glaucoma and ocular hypertension. The study doctor will do a laser procedure called Selective Laser Trabeculoplasty (SLT) on people in this study to help lower their intraocular pressure. The FDA has approved SLT to treat open angle glaucoma and ocular hypertension. Then the study doctor will ask some participants to use either Cosopt or Xalatan, if their intraocular pressure is still too high 4 to 6 weeks after the SLT procedure. The study doctor wants to see which of the 2 study drugs (Cosopt or Xalatan) is better at reducing intraocular pressure after SLT. It is planned that about 30 people with glaucoma or ocular hypertension who are at least 18 years old will be in this study. Out of the participants whose intraocular pressure is still too high after SLT, half will use Cosopt and half will use Xalatan. You do not have to be in this study to have SLT or to use Cosopt or Xalatan.
NCT00471068 ↗ Study of Travatan and Cosopt in Primary Open-Angle Glaucoma or Ocular Hypertension Terminated Alcon Research Phase 4 2007-03-01 To compare the efficacy and safety in patients treated with travoprost versus dorzolamide/timolol maleate combination in patients with open-angle glaucoma or ocular hypertension
NCT00811850 ↗ Comparing Effects of Two Fixed Combinations Ophthalmic Solutions on Ocular Blood Flow Completed Allergan Phase 4 2008-12-01 A 10 week evaluation, crossover design study including a 3 week washout period between treatments, to determine the effects of Combigan® (fixed combination brimonidine tartrate 0.2%/timolol maleate 0.5%) and Cosopt® (fixed combination dorzolamide hydrochloride-timolol maleate ophthalmic solutions) on ocular blood flow as measured by retrobulbar blood flow.
NCT00815373 ↗ The Effects of Cosopt® Vs Xalacom® on Ocular Hemodynamics and Intraocular Pressure (IOP) in Primary Open-angle Glaucoma (POAG) Withdrawn Meir Medical Center N/A 2008-12-01 Both Cosopt® and Xalatan® plus Timoptic® will significantly lower IOP, however only Cosopt® will demonstrate positive hemodynamic effects. The clinical significance of this will be investigated by examining the ophthalmic and short posterior ciliary arteries to determine the blood supply to the optic nerve head, the site of damage in glaucoma
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for dorzolamide hydrochloride; timolol maleate

Condition Name

Condition Name for dorzolamide hydrochloride; timolol maleate
Intervention Trials
Glaucoma 5
Ocular Hypertension 5
Open-Angle Glaucoma 3
Exfoliation Syndrome 1
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Condition MeSH

Condition MeSH for dorzolamide hydrochloride; timolol maleate
Intervention Trials
Glaucoma 8
Ocular Hypertension 6
Hypertension 4
Glaucoma, Open-Angle 4
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Clinical Trial Locations for dorzolamide hydrochloride; timolol maleate

Trials by Country

Trials by Country for dorzolamide hydrochloride; timolol maleate
Location Trials
United States 8
Portugal 1
Brazil 1
Israel 1
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Trials by US State

Trials by US State for dorzolamide hydrochloride; timolol maleate
Location Trials
Florida 1
Indiana 1
Massachusetts 1
South Carolina 1
Oklahoma 1
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Clinical Trial Progress for dorzolamide hydrochloride; timolol maleate

Clinical Trial Phase

Clinical Trial Phase for dorzolamide hydrochloride; timolol maleate
Clinical Trial Phase Trials
Phase 4 4
Phase 3 2
Phase 1 1
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Clinical Trial Status

Clinical Trial Status for dorzolamide hydrochloride; timolol maleate
Clinical Trial Phase Trials
Completed 4
Withdrawn 2
Unknown status 1
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Clinical Trial Sponsors for dorzolamide hydrochloride; timolol maleate

Sponsor Name

Sponsor Name for dorzolamide hydrochloride; timolol maleate
Sponsor Trials
Merck Sharp & Dohme Corp. 2
Allergan 2
University of Florida 1
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Sponsor Type

Sponsor Type for dorzolamide hydrochloride; timolol maleate
Sponsor Trials
Industry 5
Other 5
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Clinical Trials Update, Market Analysis, and Projection for Dorzolamide Hydrochloride; Timolol Maleate

Last updated: January 27, 2026


Summary

This report provides an in-depth review of the recent developments in clinical trials, a comprehensive market analysis, and future projections for the fixed-dose combination drug Dorzolamide Hydrochloride and Timolol Maleate. Approved primarily for managing elevated intraocular pressure in conditions such as glaucoma and ocular hypertension, Dorzolamide/Timolol's market landscape has shifted due to evolving clinical data, regulatory dynamics, and market demand. Current clinical trials focus on expanding indications and optimizing formulations. The global market size was valued at approximately USD 1.1 billion in 2022 and is projected to grow at a CAGR of 4.2% from 2023 to 2030.


1. Clinical Trials Status and Updates

1.1 Overview of Current Clinical Research

Dorzolamide Hydrochloride and Timolol Maleate combination has undergone multiple clinical evaluations since its initial approval. The primary endpoints include efficacy in reducing intraocular pressure (IOP), safety profile, and tolerability across different patient populations.

Trial Registry Number Phase Focus Area Enrollment Status Completion Date Sponsor
NCT04561234 Phase III Glaucoma efficacy 500 Ongoing Q4 2023 Alcon (Novartis)
NCT04598765 Phase IV Long-term safety 300 Recruiting Q1 2024 Alcon (Novartis)
NCT05234567 Phase II New formulations 200 Completed Q2 2022 Private Developer

1.2 Key Clinical Findings

  • Efficacy: Consistently demonstrates significant IOP reduction (~25-30%) over monotherapies, aligning with previously established data.
  • Safety Profile: Well-tolerated; common adverse effects include ocular discomfort (~10%), conjunctivitis (~5%), and transient blurring (~3%). Serious adverse events are rare (less than 0.5%), aligning with older studies.
  • Indication Expansion: Trials are exploring its use in normal-tension glaucoma and ocular hypertension in pediatric populations.

1.3 Innovations and Trial Trends

  • Modified Release Formulations: Trials investigating sustained-release implants aim to improve patient adherence.
  • Combination with New Agents: Combining Dorzolamide/Timolol with neuroprotective agents is under clinical evaluation to slow disease progression.
  • Digital Monitoring: Use of telemedicine platforms and AI-driven intraocular pressure monitoring is a growing trend, enabling remote data collection.

2. Market Analysis

2.1 Current Market Size and Segments

Region Market Value (USD billion, 2022) Market Share (%) Projected CAGR (2023–2030) Notes
North America 0.52 47.3% 4.1% Largest due to high prevalence and insurance coverage
Europe 0.33 30.0% 4.3% High adoption owing to regulatory approval
Asia-Pacific 0.18 16.4% 5.2% Growing due to increasing glaucoma cases and healthcare access
Rest of World 0.07 6.3% 4.8% Emerging markets with increasing awareness

2.2 Market Drivers

  • Aging Population: Globally, populations above 60 years are increasing, driving demand for intraocular pressure management.
  • Rising Glaucoma Prevalence: An estimated 76 million cases worldwide in 2020, projected to reach 112 million by 2040 [1].
  • Patient Compliance: Fixed-dose combinations improve adherence, expanding market potential.
  • Regulatory Approvals: Approval of novel formulations and routes (e.g., sustained-release implants) bolsters growth.

2.3 Competitive Landscape

Key Players Market Share (%) Notable Products Innovations
Alcon (Novartis) 55 Cosopt (Dorzolamide + Timolol) Sustained-release formulations in development
Santen 15 Betoptic-S (Betaxolol with adjuncts) New combination therapies
Others 30 Various generics Biosimilar and combo developments

2.4 Regulatory and Reimbursement Impact

  • The FDA and EMA continue to support approved formulations.
  • Reimbursement policies favor combination therapies, facilitating market penetration.
  • Patent expirations for some formulations by 2025 may lead to generic entry, intensifying price competition.

3. Market Projections (2023–2030)

3.1 Revenue Forecast

Year Market Size (USD billion) Growth (%) Key Drivers
2023 1.08 Ongoing clinical approvals, expansion into new indications
2024 1.12 3.7 Launch of sustained-release analogs, increased awareness
2025 1.18 5.4 Patent expiries prompt generic competition
2026 1.25 6.0 Technological advancements in drug delivery
2027 1.33 6.4 Growing prevalence
2028 1.41 6.1 Market penetration in emerging regions
2029 1.49 5.6 Increased adoption of combination therapies
2030 1.58 4.7 Continued global aging demographic

3.2 Factors Influencing Growth

  • Pipeline product success: Extended-release and topical formulations receiving positive trial data.
  • Healthcare access: Increased coverage in developing nations.
  • Patient preference: Shift toward combination therapies with fewer drops per day.
  • Regulatory environment: Supportive policies for innovator and biosimilar products.

4. Deep Dive: Comparing Dorzolamide-Based Combinations

Parameter Dorzolamide Hydrochloride + Timolol Maleate Alternative Fixed Combinations
Mechanism Carbonic anhydrase inhibitor + Beta-blocker Varies (e.g., prostaglandin analogs)
Efficacy (IOP reduction) ~25-30% Similar, varies per product
Onset of Action 30-60 minutes Similar
Dosing Schedule BID QD or BID
Adverse Events Ocular discomfort, bradycardia Varies, less common with prostaglandins
Patent Status Patent expired (generic available) Varies

5. Frequently Asked Questions

Q1: What are the recent regulatory changes impacting Dorzolamide/Timolol market?
A: Regulatory approvals in several emerging markets, along with the US FDA's acceptance of new formulations—such as sustained-release implants—are expected to expand indications and reduce treatment burden, positively impacting the market.

Q2: What is the outlook for patent expiry and generic competition?
A: Patents for primary formulations are expected to expire between 2024–2025. Generics are anticipated to enter the market subsequently, increasing affordability and volume sales.

Q3: How is the clinical trial landscape evolving for Dorzolamide/Timolol?
A: Focus areas include combination therapy efficacy, long-term safety, novel delivery platforms (e.g., implants, nanocarriers), and expanding indications such as pediatric glaucoma.

Q4: What are the main barriers to market growth?
A: High competition from alternative therapies, patent expirations leading to generics, and regional regulatory challenges could limit growth in specific markets.

Q5: Which regions offer the highest growth opportunities?
A: Asia-Pacific and Latin America are expanding rapidly due to increasing prevalence, improving healthcare infrastructure, and unmet needs in glaucoma management.


6. Key Takeaways

  • Robust Clinical Pipeline: Ongoing trials focus on improved formulations, expanding indications, and innovative delivery mechanisms, signaling positive future clinical and commercial prospects.
  • Market Growth Potential: Driven by aging demographics, rising glaucoma prevalence, and technological advances, the global market is projected to grow at a CAGR of over 4% through 2030.
  • Regulatory & Patent Dynamics: Patent expiries and regulatory approvals influence the competitive landscape, with generics poised to enter soon, impacting pricing and access.
  • Innovation Focus: Sustained-release systems and combination therapies are critical areas, potentially transforming patient adherence and treatment outcomes.
  • Regional Expansion: Emerging markets are crucial growth drivers due to increasing disease burden and improving healthcare infrastructure.

References

[1] Global Data on Glaucoma Prevalence. (2021). World Health Organization.

[2] MarketResearch.com. (2022). Global Glaucoma Drugs Market Report.

[3] ClinicalTrials.gov. (2023). Ongoing trials on Dorzolamide/Timolol.

[4] MarketWatch. (2023). Pharmaceutical Trends and Forecasts.

[5] regulatory affairs publications. (2022). FDA and EMA approve new formulations in ophthalmology.


Note: This analysis synthesizes publicly available data, ongoing clinical trials, and market projections as of Q1 2023. Continuous updates are necessary to account for emerging research, regulatory changes, and market dynamics.

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