My problem concerns ED. I m 69 years old, in very good health, I workout 3X per week, my weight is within the standards for my height and build. My wife who is deceased could not have sex for the last year and a half be fore her death due to cancer complications. I ve recently had the opportunity to begin having sex again, and experienced ED. I have been on a low dose blood pressure medicine which my cardiologist changed thinking the ED was a result of that medication. I ve used Viagra and have no problem achieving an erection. Recently, I noted that while my erection problem has been diminished, I have a problem experiencing ejaculation. So I m wondering if lack of semen and sperm production caused my ED, and what I can do to up my semen volume to experience an orgasm. Are there specific prescription drugs to create more volume? Thanks for your help.