Never heard of Pro Viagra as such. If you mean to say generic Viagra,then
1] Both generic and brand 비아그라 복용방법 Viagra gives same effect, both differ in price. Generic Viagra is cheap while brand 비아그라 복용방법 is costly.
2] You require prescription for brand 비아그라 구매 Viagra while generic doesn’t require prescription.
3] Generic Viagra has more chance of showing side effect, while brand has less because you acquire Viagra prescription once doctor 비아그라 복용방법 recommend you based on your health for brand Viagra.