Additive effect of dorzolamide hydrochloride to patients taking travoprost: A retrospective study

BackgroundA retrospective chart review study at a Veterans Affairs hospital evaluated intraocular pressure change after dorzolamide hydrochloride 2% was administered to patients already using travoprost. A literature search found no other study that looked specifically at this combination of drugs.MethodsA chart review of 46 patients at the Veterans Affairs Illiana Health Care System was performed evaluating the intraocular pressures after dorzolamide hydrochloride was added to travoprost. Baseline intraocular pressures were obtained on patients who had been on travoprost at least 4 months. Endpoint intraocular pressures were then obtained from the visit closest to 6 months after the addition of dorzolamide hydrochloride.ResultsAn average intraocular pressure reduction of an additional 20.6% was observed after adding only dorzolamide hydrochloride to travoprost.ConclusionsThis study confirmed our clinical observations that dorzolamide hydrochloride added to travoprost is an excellent and safe choice to further lower intraocular pressures.