VIAGRA is a medicine used to treat erectile dysfunction (impotence) in men. It can help many men who have erectile dysfunction get and keep an erection when they become sexually excited (stimulated).
Hi. i have used viagra for over 2 years now and so far have not had any side efects. never heared of blue vision . will try to google it and see what i can find out .
Well you will not experience all the side effects listed in the leaflet, it just depends on person to person. I haven't had any blue vision at all since I started using Viagra.
Similar to other drug Viagra also has it side effects, surely not the rigorous once but such as headache, nausea, and vomiting. And avoid overdoses and taking it again and again, as this can bring you in trouble.