Difference between pro Viagra and Viagra?

Never heard of Pro Viagra as such. If you mean to say generic Viagra,then 1] Both generic and brand 비아그라 사용법 Viagra gives same effect, 비아그라 정품 both differ in price. Generic Viagra is cheap while brand 비아그라 구매 방법 is costly. 2] You require prescription for brand 비아그라 사용법 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 recommend you based on your health for brand Viagra.