[davidjohnson]

I am a 57 year old man, is there any risk in taking Viagra?

[kevinthomas]

Viagra and Cialis may increase the risk of sudden blindness in men with a history of heart attacks or high blood pressure, research suggests. ... However, the drugs' manufacturers have criticised the study as too small and said erectile dysfunction and Naion (optic nerve damage) had many of the same risk factors, making it difficult to know if the drug or the underlying condition was to blame.