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OBJECTIVES: To compare the efficacy of combinations of betaxolol-brinzolamide and timolol-dorzolamide as suppressors of aqueous humor flow and ocular hypotensive agents. DESIGN: Placebo-controlled, masked comparison of the two drug combinations. PARTICIPANTS: Twenty-five normal human volunteers with the fellow eye serving as control. METHODS OF TESTING: Fluorophotometric measurement of aqueous humor flow and pneumatonometric measurement of intraocular pressure. MAIN OUTCOME MEASURES: Aqueous humor flow and intraocular pressure. RESULTS: The betaxolol-brinzolamide combination lowered aqueous flow 39-44%, and the timololdorzolamide combination lowered aqueous flow 51%. The betaxolol-brinzolamide combination lowered intraocular pressure 14-19%, and the timolol-dorzolamide combination lowered it 18-24%. CONCLUSIONS: Both drug combinations were effective; the timolol-dorzolamide combination appeared to be the more effective of the two after short-term exposure (24 hours).
Dr. R.F. Brubaker, Department of Ophthalmology, Mayo Clinic and Mayo Foundation, Rochester, MN 55905, USA
11.3.4 Betablocker (Part of: 11 Medical treatment > 11.3 Adrenergic drugs)
11.5.2 Topical (Part of: 11 Medical treatment > 11.5 Carbonic anhydrase inhibitors)