Please know that after a prostatectomy you have over a 50% chance of getting an erection, with the odds being much better if you take Sildenafil or Tadalafil. Trimix also works but you need to inject it into your penis and may have an erection that lasts for hours. If you choose to go with ADT, your testosterone will go down to nothing and you will have erectile disfunction, hot flashes, frequent crying, depression and a lot of other side effects, both physical and psychological. Tough choices, but the good news is that either treatment can keep your cancer from killing you. Also know that you can still have orgasms whether you get an erection or ejactulate or not.