I am 74 years of age and my wife is 49. I am not a billionaire and can not rest assured she will never leave me because of my money. You can imagine how much potency means to me. We love each other but I understand that she is younger and has certain needs. And if I won't be able to meet her needs, soon there will appear someone else, younger and full of power. So as soon as I started noticing some decrease in my sexual performance and power I asked my doctor to advise me on erectile dysfunction medications. These drugs serve for me as a guarantee that I won?t be left alone to wait for my death and that my wife won't look for someone else. So I can tell you for sure what ED drugs on the market are worth of paying attention and what are not. I know the true value of an effective medication that remains effective for more than a month. And I know what it means to find a medication that is not only effective, but also problem-free - I mean causes no side effects, like blurred vision, dizziness or insomnia. Viagra Professional is the best ED drug that I have tried. I have been on it for 5 months already and it is now just as effective as it was during my first week on it. After taking the pill I am ready to have marvelous sex in less than half an hour and my hard erection lasts for about three hours. I am confident of the medication and I am confident of my marriage.