A lot has been written on the subject of Viagra and blindness since the story first surfaced that Viagra may cause sudden blindness among some men.  There was even speculation that Viagra may have to be recalled and Viagra lawsuits have already been filed.  (Related article:  Pfizer sued by Viagra patient)

Like Bextra, that was recalled by Pfizer after FDA banned the drug, a recall of Viagra will be disastrous for the company.  After all millions of people worldwide take Viagra for erectile dysfunction (ED).  Pfizer is now saying that a review of all post-marketing ocular event reports has concluded that there is no evidence of increased risk of blindness among patients taking Viagra.  In other words, the findings of the University of Minnesota scientists are not accurate.  (Related article:  Pfizer defends Viagra)

In a press statement, Pfizer said discussions are progressing with the FDA to update the Viagra label to reflect rare reports of non-arteritic anterior ischemic optic neuropathy (NAION) in some men who have used the medicine. According to the company, the FDA has concluded that no causal relationship between Viagra and NAION exists.  The FDA has not made its own statement yet but the company says that the FDA is reportedly asking that all drugs like Viagra, for instance, Levitra and Cialis, carry a warning on the label. 

Interestingly enough, the FDA has approved the active ingredient in Viagra as another drug Revatio for treating an illness called PAH.