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24-hr Intraocular Pressure Control With Dorzolamide/Timolol vs the Brimonidine/Timolol Fixed Combination

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00972257
Recruitment Status : Completed
First Posted : September 4, 2009
Last Update Posted : May 12, 2014
Information provided by (Responsible Party):
AGP Konstas, Aristotle University Of Thessaloniki

Brief Summary:
The proposed study will compare for the first time the quality of 24-hour IOP control with Brimonidine/Timolol fixed combination (BTFC) versus Dorzolamide/Timolol fixed combination (DTFC) after a run-in period of 2 months with timolol. This crossover comparison may determine the real efficacy of the two fixed combinations and the design of the proposed study may explain for the first time why the 24-hour IOP reduction provided by BTFC is less than might be anticipated.

Condition or disease Intervention/treatment Phase
Glaucoma Drug: treatment with dorzolamide/timolol Drug: treatment with brimonidine/timolol Phase 4

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 64 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single (Investigator)
Primary Purpose: Treatment
Official Title: Quality of 24-hour Intraocular Pressure Control Obtained With Dorzolamide/Timolol Fixed Combination (DTFC) Compared With the Brimonidine/Timolol Fixed Combination (BTFC) in Subjects With Primary Open-angle Glaucoma
Study Start Date : January 2009
Actual Primary Completion Date : September 2009
Actual Study Completion Date : September 2009

Arm Intervention/treatment
Active Comparator: Drug: Dorzolamide/Timolol Drug: treatment with dorzolamide/timolol
24-hour IOP control with the two fixed combinations

Active Comparator: Treatment with Brimonidine/Timolol Drug: treatment with brimonidine/timolol
24-hour pressure control with brimonidine/timolol

Primary Outcome Measures :
  1. To compare the quality of 24-hour IOP control after 2 months of chronic therapy with the Dorzolamide/Timolol fixed combination versus the Brimonidine/Timolol fixed combination in primary open-angle glaucoma. [ Time Frame: 3 months ]

Secondary Outcome Measures :
  1. Assess fluctuation of 24-hour pressure [ Time Frame: 3 months ]

Information from the National Library of Medicine

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Ages Eligible for Study:   29 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Consecutive, newly diagnosed or previously untreated POAG patients
  • Patients with typical glaucomatous disc, or visual field damage
  • Patient must have IOP (at 10:00 ± 1 hour)greater than 25 mm Hg

Exclusion Criteria:

  • Uncontrolled glaucoma
  • Distance best corrected Snellen visual acuity worse than 1/10
  • Contraindications to brimonidine or dorzolamide and β-blockers
  • History of lack of response (<10% morning IOP reduction) to any medication
  • Patient can not understand the instructions and adhere to medications
  • Patient is a female of childbearing potential or lactating mother
  • Prior surgery, past use of steroids (within 2 months)
  • Severe dry eyes and use of contact lenses
  • History of non-adherence
  • Patients with closed angles

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00972257

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Glaucoma Unit, 1st University Dept of Ophthalmology
Thessaloniki, Greece, 546 36
Sponsors and Collaborators
Aristotle University Of Thessaloniki
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Principal Investigator: Anastasios Konstas, MD, phD Head of Glaucoma Unit
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: AGP Konstas, Professor in Ophthalmology, Aristotle University Of Thessaloniki Identifier: NCT00972257    
Other Study ID Numbers: A5132
First Posted: September 4, 2009    Key Record Dates
Last Update Posted: May 12, 2014
Last Verified: May 2014
Keywords provided by AGP Konstas, Aristotle University Of Thessaloniki:
24-hour IOP control
primary open-angle glaucoma
Additional relevant MeSH terms:
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Ocular Hypertension
Eye Diseases
Brimonidine Tartrate
Adrenergic beta-Antagonists
Adrenergic Antagonists
Adrenergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Anti-Arrhythmia Agents
Antihypertensive Agents
Adrenergic alpha-2 Receptor Agonists
Adrenergic alpha-Agonists
Adrenergic Agonists
Carbonic Anhydrase Inhibitors
Enzyme Inhibitors