The real question here is why someone without ED would wantto take the drug to begin with. I am not sure if what you are really trying toask is if patients without organic erectile dysfunction were to take the drugthan what the effect would be. Thereactually is a group of patients who take a similar drug for a disease processother than ED, namely pulmonary hypertension without untoward side effects. In patients without ED, there really shouldnot be any negative side effects of taking the drug...