Yes it does.. I have both viagra and cailis.. I must say that the cailis is better in terms of lesser sides.. No stuffy nose, less headaches(dose dependant). One thing that Viagra has over cailis.. is that you start feeling the effect faster with the viagra.
But, i'll say this.. I will never buy viagra again... cailis all the way!
You'll have to see what works best for you.. but 25mgs is a good start. I've taken all the way up to 100mgs..
Had a woody for days.. Had to turn off all the ceiling fans.. It was to much wind..LOL