I am a 79 yr. old male, wife passed after 54 yrs together, and am just starting to date a woman 64 yrs. old. So I requested a ED Pill from my Doctor since I do experience A-Fib, and take Pradaxa for blood thinner. He prescribed a generic for Viagra, 50MG, which I tried last night, and seemed to help, but did not get a lasting erection? I have read about some of the Natural Pills, such as Zytenz? Is there anything you could recommend?