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November 18, 2004

Disturbance of vision by COX-2 inhibitors

Topics: Clinical Pharmacology

Article Review

Expert Opin Drug Saf. 2004 Nov;3(6):607-14.

Disturbance of vision by COX-2 inhibitors. Coulter DM, Clark DW.

University of Otago, Intensive Medicines Monitoring Programme, Department of Preventive and Social Medicine, Dunedin, New Zealand.

In this review, 35 cases of acute, reversible, sometimes severe, disturbances of vision closely associated with the use of celecoxib or rofecoxib are described. These were identified from three different databases using strict selection criteria. The events included temporary blindness, visual field defect, scotoma, teichopsia, blurred vision, decreased vision and abnormal vision. The reactions had a mean onset time of 9.5 days and recovery occurred within 3 days following withdrawal of the drug. The reactions do not appear to be related to age, gender, dose, or indication for use. The incidence of reported cases is estimated to be not less than 5 per 10,000 patients.

Possible mechanisms for this type of reaction are described. The most likely appears to be the result of interference with the retinal blood supply through reduced production of prostanoids. Genetic polymorphisms that affect drug metabolism or uptake could be risk factors and are discussed along with suggestions for research.

Posted by Hyscience at November 18, 2004 2:20 PM

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