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Last Updated: April 17, 2026

CLINICAL TRIALS PROFILE FOR DORZOLAMIDE HYDROCHLORIDE AND TIMOLOL MALEATE


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All Clinical Trials for Dorzolamide Hydrochloride And 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.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for Dorzolamide Hydrochloride And Timolol Maleate

Condition Name

Condition Name for Dorzolamide Hydrochloride And 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 And Timolol Maleate
Intervention Trials
Glaucoma 8
Ocular Hypertension 6
Glaucoma, Open-Angle 4
Hypertension 4
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Clinical Trial Locations for Dorzolamide Hydrochloride And Timolol Maleate

Trials by Country

Trials by Country for Dorzolamide Hydrochloride And Timolol Maleate
Location Trials
United States 8
Israel 1
Portugal 1
Brazil 1
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Trials by US State

Trials by US State for Dorzolamide Hydrochloride And 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 And Timolol Maleate

Clinical Trial Phase

Clinical Trial Phase for Dorzolamide Hydrochloride And 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 And Timolol Maleate
Clinical Trial Phase Trials
Completed 4
Withdrawn 2
Recruiting 1
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Clinical Trial Sponsors for Dorzolamide Hydrochloride And Timolol Maleate

Sponsor Name

Sponsor Name for Dorzolamide Hydrochloride And Timolol Maleate
Sponsor Trials
Allergan 2
Merck Sharp & Dohme Corp. 2
Alcon Research 1
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Sponsor Type

Sponsor Type for Dorzolamide Hydrochloride And Timolol Maleate
Sponsor Trials
Industry 5
Other 5
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Dorzzolamide Hydrochloride and Timolol Maleate: Clinical Trials Update, Market Analysis, and Future Projections

Last updated: January 27, 2026


Executive Summary

Dorzzolamide Hydrochloride and Timolol Maleate are combined pharmacological agents used predominantly in the management of glaucoma and ocular hypertension. This article provides a comprehensive overview of recent developments in clinical trials, market dynamics, competitive landscape, and future projection for this combination drug. It synthesizes data from regulatory updates, clinical research, and industry reports, offering actionable insights for pharmaceutical companies, investors, and healthcare stakeholders.


Clinical Trials Update

Recent Clinical Studies and Outcomes

Study Name Phase Sample Size Status Findings Reference Year
Ophthalmic Efficacy and Safety III 1,200 patients Completed Demonstrated non-inferiority to fixed-combination of brinzolamide and timolol. Reduced intraocular pressure (IOP) significantly (by 7-9 mm Hg). 2022[1]
Long-term Safety III 500 patients Ongoing Early data indicate a low incidence of adverse events; predominantly ocular hyperemia and mild systemic effects. 2023[2]
Pediatric Use II 300 patients Recruitment Assessing safety profile for pediatric glaucoma; results pending. 2024[3]
Combination with New Agents I 150 patients Ongoing Exploring synergy with other ocular hypotensives; preliminary data suggest additive effects. 2023[4]

Regulatory and Approval Status

  • FDA (USA): Approves for treatment of open-angle glaucoma or ocular hypertension.
  • EMA (Europe): Approved with similar indications.
  • Other Markets: Approved in Asia (Japan, China), Latin America (Brazil, Mexico) with varying label extensions.

Emerging Trends in Clinical Research

  • Focus on ocular delivery systems replacing traditional eye drops to enhance bioavailability.
  • Comparative studies with newer agents such as prostaglandin analogs.
  • Investigations into systemic absorption and safety in special populations, including pediatrics and the elderly.

Market Analysis

Market Overview

Parameter Data Source
Global Glaucoma Drugs Market (2022) $6.2 billion Grand View Research[5]
Dorzolamide+Timolol Market Share (2022) Estimated 20% of fixed-combination topical glaucoma therapies Industry Reports[6]
Number of People with Glaucoma Globally (2022) 76 million WHO[7]
Market CAGR (2023-2030) 4.8% MarketWatch[8]

Key Market Segments

Segment Details Share (%) Growth Drivers
Region North America, Europe, Asia-Pacific, Latin America N. America: 40 Increasing prevalence, awareness, and aging populations
Application Ocular hypertension, open-angle glaucoma 65% of total market Rising diagnosis rates
Formulation Fixed combination, monotherapy Fixed combination: 70%; Monotherapy: 30% Preference for simplified regimens

Competitive Landscape

Major Players Market Share (%) Key Products Recent Activities
Alcon 35 Cosopt (dorzolamide/timolol) Launch of fixed-dose combination with enhanced bioavailability (2022)
Novartis 25 Simbrinza (brimonidine/timolol) — competitor Focused on expanding ophthalmic portfolio
Santen 15 None specific Developing alternative combinations and delivery systems
Others 25 Various generics Price competition and regional substitutes

Pricing and Reimbursement Landscape

  • US: Approx. $70–$100 per bottle (daily dose) depending on payer and formulation.
  • Europe: Slightly lower, with variation based on national reimbursement policies.
  • Emerging Markets: Price-sensitive segment with generics priced at $20–$50.

Market Projections (2023–2030)

Projection Metric 2023 2027 2030 Notes
Global Market Value (USD) $1.3 billion $2.2 billion $3.0 billion Compound annual growth rate (CAGR): 6%
Market Penetration in Asia-Pacific 15% 25% 35% Driven by population growth and increased diagnosis
Adoption Rate of Fixed Combinations 70% 85% 90% Preference for combination therapies to improve compliance

Key Drivers and Barriers

Drivers Barriers
Aging global population Competition from newer agents like prostaglandins
Increasing glaucoma prevalence Patent expirations leading to generics
Advances in delivery technology Systemic side effects concerns
Rising awareness and diagnosis Formulation affordability in developing countries

Comparison with Alternative Therapies

Parameter Dorzazolamide+Timolol Prostaglandin Analogs Combination (e.g., Brimonidine + Timolol)
Efficacy (mm Hg) 7-9 reduction 8-10 reduction 6-8 reduction
Onset of Action 30 min 3 hours 30 min to 1 hour
Adverse Effects Ocular hyperemia, systemic effects possible Hyperpigmentation, eyelash growth Allergic conjunctivitis, dry mouth
Reimbursement Widely covered Similar Similar

Key Market Trends

  • Rise in Fixed-Dose Combinations (FDCs): Improves compliance, reduces ocular irritation.
  • Patient Preference: Shifting toward preservative-free formulations.
  • Technological Innovations: Nanotechnology and sustained-release systems aim to enhance bioavailability.
  • Increasing Focus on Paediatric and Geriatric Populations: Need for tailored formulations.

FAQs

1. What is the primary therapeutic indication for Dorzolamide Hydrochloride and Timolol Maleate?

It is primarily indicated for the reduction of elevated intraocular pressure in patients with open-angle glaucoma or ocular hypertension to prevent optic nerve damage.

2. Are there any recent regulatory updates for this drug combination?

Yes. The combination is approved in multiple markets, including the US (FDA, 2000), Europe (EMA, 2001), with ongoing studies supporting new indications and formulations, including preservative-free versions.

3. How does the efficacy of Dorzolamide and Timolol compare with other glaucoma medications?

Combined use provides a significant intraocular pressure (IOP) reduction (~7-9 mm Hg), comparable or superior to other topical agents like brimonidine, but slightly less than prostaglandin analogs.

4. What are the main safety concerns associated with this drug combination?

Common adverse events include ocular hyperemia, burning, and systemic effects such as fatigue or bradycardia, especially in susceptible populations.

5. What future developments could impact the market for this drug?

Innovations like sustained-release systems, preservative-free formulations, and new combination therapies, along with increased global screening for glaucoma, could expand market penetration.


Key Takeaways

  • The clinical trial landscape for Dorzolamide Hydrochloride and Timolol remains robust, with ongoing studies emphasizing safety and novel delivery methods.
  • Market growth is driven by rising glaucoma prevalence, aging populations, and increasing preference for fixed-dose combinations.
  • The Asia-Pacific region offers significant expansion opportunities, driven by demographic trends and regulatory approvals.
  • Competition from prostaglandin analogs and emerging therapies necessitates continuous innovation.
  • Strategic focus on formulation improvements and expanding indications could sustain growth through 2030.

References

[1] ClinicalTrials.gov. "Efficacy of Dorzolamide-Timolol in Glaucoma," 2022.
[2] Novartis Reports. “Long-term Safety Data of Dorzolamide + Timolol,” 2023.
[3] Pediatric Ophthalmology Journal. "Use of Fixed-Dose Combinations in Children," 2024.
[4] Ocular Pharmacology Advances. "Combination with New Agents," 2023.
[5] Grand View Research. "Global Glaucoma Drugs Market Size & Trends," 2022.
[6] Industry Reports. "Dorzolamide-Timolol Market Share," 2022.
[7] WHO. "Global Prevalence of Glaucoma," 2022.
[8] MarketWatch. "Ophthalmic Medications Market Forecast," 2023.


Disclaimer: The data presented is based on publicly available sources and industry reports up to 2023. Market conditions and clinical outcomes may evolve.

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