[Man]

It might help if he strengthens his leg and groin muscles with squats. If he isn't already in physically healthy shape. Poor circulation, so cardiovascular training could be helpful as well. He might also benefit from strengthening his pelvic floor and the muscles there so ask him to Kegel if he doesn't do them already. Quit smoking cigarettes if he does that as well.

Generally speaking I am one to believe that a host of other physical options can remedy his situation before you need injections or meds. I have read successful stories of men using pumps.