Depending upon your age and medical history, I don't think that you can return to ever not taking the pills or injections. I started on Viagra when I was 53 due to hypertension medication. Had the RP in May of 2008. The Edex injections work fine but the pain is something else so I plan to switch to Trimix soon.
However, I have noticed the noctural erections returning lately. And after doing an injection, I am semi-hard for days afterwards which I take to be encouraging. I'm also taking viagra on an every other day basis.
Based on my recovery so far, I expect to be completed with the injections in another year. Then it will only be the Viagra or Cialis.
PSA jumped to 10 in one year
Gleason score of 4+4=8
Biopsy was 50% maglignant
RP in May of 2008, all cancer removed.