please help me! I am a twenty year old man suffering from both premature ejaculation and erectile dysfunction after my first orgasm has occurred. I used to last about ten minutes before my first orgasm and then instantly become hard again and remain erect for an hour or more. Now I ejaculate in about one minute and am unable to become hard again for at least an hour and when I do get hard I ejaculate quickly again. I recently began taking androstenedione and tribulus terrestrus as well as ephedrine and caffeine to help improve my weight lifting. What is causing my problem and what can I do to get back to the way I was? I want to satisfy my woman again. thank you.