How can I deal with impotence after prostate disease?

See urologist . There are several options. If the pills don't work then you can try injections, the pump, or muse (alprostadil). If nothing else works a prostheses.
Disease or cancer? I feel like former president clinton defining what is is. How to deal w/impotence or erectile dysfunction after prostate disease depends upon what the disease is/was. Perhaps ed isn't even related to prostate disease but rather a relationship on the rocks or stress/worry over financial security, family & friend issues, etc. 1st thing is get evaluated by your family doctor to find root cause.