Wow... What are the odds? I actually got asked this question at work today. Well as I told the woman today, Viagra (sildenafil citrate) basically dilates the blood vessels and arteries aiding in the movement of blood which is why it's used to assist patients with ED, which usually occurs when the prostate becomes over enlarged and begins to constrict the fluid that flows to the penis, urine, semen, blood that kind of stuff. So as near as I can figure it would probably give a women the same since of stimulation as it does a man since women become more... excitable, I guess you could say, with increased blood flow to the clitoral groupings. Just an MD's opinion though I haven't really read the trial data on it.