I had the same Gleason score back in 2007 at the age of 63. was treated with two Lupron shots and 42 radiation treatments. To this day I have endured ED. Tried Viagra, Cialis and all prescription drugs as well as numerous non prescription, including penis injections. Today with a mixture of those drugs I can get about an 85 % erection and can only maintain for a short period with penetration being impossible. Back in 2007 this was the best way to go. For some. Unfortunately for me I fell in that 1-3% category where what can go wrong did. I still have hope for something to work. However, I have two doctor friends who in the past three years used a combination of seeds and minimal radiation treatment. Neither one of them has encountered any ED problems. Good luck to those of you who are dealing with Prostate Cancer.