Case Report Anterior Ischemic Optic Neuropathy Associated with Udenafil

is a drug used in urology to treat erectile dysfunction and belongs to a class of drugs called phosphodiesterase type 5 (PDE 5) inhibitors. Other erectile dysfunction drugs such as sildenafil, tadalafil and vardenafil are also PDE5 inhibi-tors. The authors report the first literature case of anterior ischemic optic neuropathy (AION) associated with udena-fil. Case Report A 54-year-old male complained of decreased visual field in his right eye. He also had a history of sexual dysfunc-tion, for which he was prescribed udenafil. He took his first dose of 100 mg udenafil three days before his visit to our clinic. The next day he found that his eye was mildly irritated, and he had a mild headache. He discussed these symptoms with his urologist, and his symptoms subside