Regaining Erectile Function after Prostate Cancer Surgery:

Most studies in the literature use endpoints of 18-36 months after prostate cancer surgery. Nerve tissue can be easily damaged during robotic prostatectomy, regardless of the skill of the surgeon, and takes a long time to regenerate.

Nerve regeneration after radical prostatectomy - Santis Health

This encourages nerve regeneration and increases blood flow to the penis. There are three tablets in the same family as Viagra that you can take: Cialis (tadalafil), Levitra (vardenafil) and Viagra itself (sildenafil). There is evidence that taking one of these tablets regularly after prostate surgery speeds recovery of potency.