title: Viagra and anterior ischemic optic neuropathy.
authors.forename: Robert A
authors.initials: RA
authors.lastname: Egan
authors.forename: Frederick W
authors.initials: FW
authors.lastname: Fraunfelder
mesh_terms: D015106:3',5'-Cyclic-GMP Phosphodiesterases / Q000037:antagonists & inhibitors; D002243:Carbolines / Q000009:adverse effects; D006801:Humans; D007093:Imidazoles / Q000009:adverse effects; D008297:Male; D018917:Optic Neuropathy, Ischemic / Q000139:chemically induced*; D010879:Piperazines / Q000009:adverse effects*; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones / Q000009:adverse effects; D000068581:Tadalafil; D014227:Triazines / Q000009:adverse effects; D000069058:Vardenafil Dihydrochloride; D014665:Vasodilator Agents / Q000009:adverse effects
chemical_list: D002243:Carbolines; D007093:Imidazoles; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D014227:Triazines; D014665:Vasodilator Agents; D000069058:Vardenafil Dihydrochloride; D000068581:Tadalafil; D000068677:Sildenafil Citrate; D015106:3',5'-Cyclic-GMP Phosphodiesterases