I too have been taking Sildenafil for 22 years and it had been working pretty well until the HOLEP surgery. My wife and I both get frustrated. Both of us in our early 70’s so things should work. I have tried Tadalafil but it doesn’t seem to work either. I will see what happens in the next couple of weeks as I try the Sildenafil every other day. Hope you get this figured out.