Dear sir, I am 50 years, healthy. No sugar and bp. My cholesterol is a little high which is not because of my food or any bad habits. As per doctors, my body produces more cholesterol and I am taking simvastatin 10mg. I am vegiterian and non-alcoholic and non-smoker. My problem is erectile disfunction. Although I have desire, I am not able to maintain erection; when it is erected, it is not strong enough. When I do some time get erection and when I stand up, it goes back. For some reason, I am not able to maintain erected position. Please help.