I can only add that, if you are able given your other meds, try out all the regular drugs (Viagra, Levitra, Cialis, etc.). Everyone seems to have a different level of response to each of these independently. And, at multiple times during your 'recovery' phase. My experience in the early days (up to about 6 months after RALP) was that Viagra did a little, but none of the others helped at all. Now, Levitra gives the best and useable response.
One nerve spared
Gleason 7 - T1c
Pre op PSA 8.2 -- first PSA ever taken at age 50 physical
Most recent PSA 0.02 (12/10)