Chlorpropamide-induced optic neuropathy.

A 65-year-old woman with adult-onset diabetes treated with chlorpropamide (Diabenese) had a toxic optic neuropathy that resolved with discontinuation of chlorpropamide therapy. Visual loss occurs in diabetics for a variety of reasons, and accurate diagnosis is necessary to institute appropriate therapy. The possibility of a drug-induced optic neuropathy should be considered in the differential diagnosis of visual loss in diabetics.