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COSOPT-S® Treatment Versus Acetazolamide Before Trabeculectomy

This study has been completed.
Information provided by (Responsible Party):
Katrin Lorenz, Johannes Gutenberg University Mainz Identifier:
First received: August 20, 2010
Last updated: September 10, 2014
Last verified: September 2014

August 20, 2010
September 10, 2014
August 2010
April 2014   (Final data collection date for primary outcome measure)
Mean IOP reduction (ΔIOP) three months after trabeculectomy in comparison to the mean preoperative IOP [ Time Frame: 12 weeks ]
measurement of eye pressure in mmHg
Same as current
Complete list of historical versions of study NCT01228149 on Archive Site
safety of both treatment arms [ Time Frame: 12 weeks ]

Safety and tolerability of both treatment arms Number of necessary 5FU injections and suture lyses Required number of needlings and reoperations Change in IOP between Visit 1 and 2 Comparison between both groups of ocular hypotension rate and filtration bleb classification in both groups at every postoperative visit.

Change in quality of life for the two therapeutical regimens in both groups Patients' satisfaction with pharmacologic intervention for IOP lowering

Same as current
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COSOPT-S® Treatment Versus Acetazolamide Before Trabeculectomy
Investigation of the Efficacy and Safety of Preoperative IOP Reduction With Preservative-free COSOPT-S® (Dorzolamide/Timolol, MSD) Eye Drops Versus Oral Acetazolamide and Dexamethasone Eye Drops

The most common cause of post-trabeculectomy filtration failure is postoperative scarring. Long-term preoperative treatment with local antiglaucoma agents containing preservatives has an increased risk of post-operative scarring of the filtration bleb. Therefore many surgeons prepare their patients for planned trabeculectomy by discontinuing local antiglaucoma drugs, controlling IOP with oral acetazolamide, and treating the eye with local steroids.

Preservative-free COSOPT-S® eye drops b.i.d now provide a possibility to reduce IOP preoperatively with the aim of avoiding postoperative excessive scarring and the known adverse effects of oral acetazolamide while achieving comparable IOP reduction and long-term outcomes.

This study will investigate comparability (non-inferiority) of medical benefits of two different IOP lowering pharmaceutical interventions prior to trabeculectomy comparing COSOPT-S® bid to oral acetazolamide plus dexamethasone.

Not Provided
Phase 4
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Procedure: Trabeculectomy
Filtrating glaucoma surgery, preoperative treatment will be assessed.
Other Name: Filtrating glaucoma surgery
  • Active Comparator: Acetazolamide
    Patients receive oral acetazolamide starting 28 days preoperatively. 7 days preoperatively dexamethasone eyedrops without preservatives are applied additionally.
    Intervention: Procedure: Trabeculectomy
  • Experimental: Cosopt S
    Patients receive Cosopt S eye drops starting 28 days preoperatively
    Intervention: Procedure: Trabeculectomy
Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
April 2014
April 2014   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Male or female patients aged 18 years or older
  • Caucasian
  • A clinical diagnosis of open angle glaucoma, pseudoexfoliation or pigment dispersion glaucoma, or ocular hypertension in one or both eyes
  • Planned trabeculectomy
  • Previous treatment with antiglaucoma agents containing preservatives for at least one month
  • Best corrected visual acuity of 20/800 or better in the study eye

Exclusion Criteria:

  • Secondary glaucoma except pseudoexfoliation glaucoma and pigmentary glaucoma
  • Current ocular infection, i.e. conjunctivitis or keratitis
  • Any abnormality preventing reliable applanation tonometry
  • Intraocular surgery or laser treatment within the past three months
  • History of surgery involving the conjunctiva
  • History of cataract surgery with sclerocorneal approach
  • Subject is allergic to sulfonamides
  • Reactive airway disease, including bronchial asthma or a history of bronchial asthma, or severe chronic obstructive pulmonary disease
  • Sinus bradycardia, second or third degree atrioventricular block, overt cardiac failure, cardiogenic shock
  • Severe renal dysfunction (CrCl < 30 ml/min) or hyperchloraemic acidosis
  • Depressed blood levels of sodium and / or potassium
  • Marked kidney and liver disease or dysfunction, gout, suprarenal gland failure, hypercalciuria or nephrocalcinosis
  • History of hypersensitivity to the investigational medicinal products or to any drug
Sexes Eligible for Study: All
18 Years and older   (Adult, Senior)
Contact information is only displayed when the study is recruiting subjects
35131; EUDRA CT 2010-019975-30
Not Provided
Not Provided
Not Provided
Katrin Lorenz, Johannes Gutenberg University Mainz
Katrin Lorenz
Not Provided
Principal Investigator: Katrin Lorenz, MD Johannes Gutenberg University Mainz
Johannes Gutenberg University Mainz
September 2014

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP