A couple of months ago, there were several cases reported connecting impotence drugs like Viagra, Cialis and Levitra to loss of vision among people who used them.
FDA Erects Label For Impotence Drugs
Answering concern about reports of a rare form of sudden blindness afflicting men who had taken erectile dysfunction medications Viagra, Cialis, and Levitra, the Food and Drug Administration issued a warning label to adorn all new packaging.