you may be suffering from male menopause
. this condition starts at age 45 with the decrease in testosterone
production. anti prostate
medicine may also aggravate the drop in testosterone. I would suggest getting testosterone levels in the labs and you may need testosterone replacement to add vigor in your life once again.
I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at: http://www.HealthcareMagic.com/doctors/dr-manuel-c-see-iv/66014 I would gladly help you. Best wishes.