Had my annual physical this week and everything was perfect. I'm a 61 year old male and my doctor said my testosterone level was borderline low. He wants me to take an injection of Testosterone, small amount, every two weeks, I admit my libdo and energy level isn't what it used to be but I was freaked out to learn that I was going through male menopause. Has anyone here had to use Testosterone replacement? How long before you noticed a change? I appreciate any feed back.