just in regards to your previous email, re side effects from the trial, there were very few, much less than viagra. Worth you looking back at that trial result announcement for more info.
Also, in regard to the age demographic, I get your point, but they are running a trial which means they want as few variables as possible so they can truly measure how the drug performs. So, healthy males in that age range have fewer variables in this regard. If they had of used older men with various health issues that affect their ability to gain or maintain an erection...then how could they have known how the drug was performing in a measurable way across those patients. Just my guess but you could ask the question of the company.
Cheers, and don't heistate too long....he who hesitates.... you know the rest!
(20min delay)