This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Comparison of the Effects of Two Glaucoma Drugs Over 24 Hours (0507A-137)(COMPLETED)

This study has been completed.
Information provided by (Responsible Party):
Merck Sharp & Dohme Corp. Identifier:
First received: April 12, 2005
Last updated: May 12, 2015
Last verified: May 2015
This study is comparing 2 medications for glaucoma and how effective they are at controlling glaucoma over the course of an entire day.

Condition Intervention Phase
Glaucoma Ocular Hypertension Drug: MK0507A, dorzolamide hydrochloride (+) timolol maleate Drug: Comparator: timolol maleate Drug: Duration of Treatment: Part 1) 6 wk timolol maleate run in Drug: Part 2) 6 wk washout pd Part 3) two 8 wk active tx pds Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: Randomized, Multicenter, Dbl-Masked, Parallel Study Evaluating the 24 Hr. Diurnal Ocular Hypotensive Effect of 2% Dorzolamide Hydrochloride/0.5% Timolol Maleate Combo. Ophthalmic Sol. in Patients w/ Open Angle Glaucoma or Ocular Hypertension

Resource links provided by NLM:

Further study details as provided by Merck Sharp & Dohme Corp.:

Primary Outcome Measures:
  • 24 hour diurnal IOP reduction after 8 weeks of treatment [ Time Frame: After 8 weeks of treatment ]

Secondary Outcome Measures:
  • IOP reduction a) from baseline at 6 weeks; b) comparison with timolol; c) comparison day versus night [ Time Frame: At 6 weeks ]

Enrollment: 330
Study Start Date: April 2005
Study Completion Date: July 2006
Primary Completion Date: July 2006 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patients with glaucoma or ocular hypertension

Exclusion Criteria:

  • Other eye conditions
  • Poor vision
  • Recent eye surgery
  • Use of contact lenses
  • Nursing or pregnant women
  • Use of some other selected medications
  • Drug or alcohol abuse
  • Asthma
  • Slow heart beat
  • Allergy or previous reaction to study drugs
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00108017

Sponsors and Collaborators
Merck Sharp & Dohme Corp.
Study Director: Medical Monitor Merck Sharp & Dohme Corp.
  More Information

Responsible Party: Merck Sharp & Dohme Corp. Identifier: NCT00108017     History of Changes
Other Study ID Numbers: 0507A-137
Study First Received: April 12, 2005
Last Updated: May 12, 2015

Keywords provided by Merck Sharp & Dohme Corp.:
Ocular hypertension (excessive pressure in the eye)

Additional relevant MeSH terms:
Ocular Hypertension
Vascular Diseases
Cardiovascular Diseases
Eye Diseases
Maleic acid
Adrenergic beta-Antagonists
Adrenergic Antagonists
Adrenergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Anti-Arrhythmia Agents
Antihypertensive Agents
Enzyme Inhibitors
Carbonic Anhydrase Inhibitors processed this record on August 23, 2017