I need some help in this area... I am currently running 400mg of Test E solo and I have never ran into this problem before. My libido is still very good but once I get on the bedroom I lose my erection, not fully but it is not as hard as it should be. I tried doing my own research and it seems that my estrogen might be too high since I am not running an AI. I just started Adex .25 EOD today.