I am sixty and physically fit. I want to perform sex with my wife but fails due to erectyle problem. If it is natural problem due to my age, then it is o.k. But if it is not an aging problem, should I take shots of testosterone? About 15 years ago, once I had the similar problem and one senior physician had prescribed two shots of "Testoviron" and I was alright. If Testoviron is safe for me, please suggest me its dose, or suggest the other suitable medicine for me. I am also suffering sometimes with lower back pain. Thanks.