Sandra, I have undergone radiation therapy for prostate cancer. I am 55 years old,and in relatively good health otherwise. I finished the treatments about a year ago, and have gone in every 3 months to get screened. My understanding is that I get screened every 3 months for 3 years, then twice a year for 2 years, then annually. I am considered in remission now, and when I make it to 5 years, I will be cancer free once again. The radiation wasn't bad, but it was no piece of cake either. It left me drained each day, and the side affects included having to have my gall bladder removed. I had a bit of trouble urinating, and my bowels were not the same for a few months. I have mostly recovered from the treatment successfully. My sex life has changed, but not vanished. It just take a little longer now. Life has returned to normal, but a new normal. It's what I considered the "best" option, and I'm grateful for the technology of today. I'd be happy to talk to you or your dad about any of it.