While I cannot answer you on your specific hormone injection, I will tell you I was given a 6 month LUPRON shot (hormone) and the side effects lasted for 14 months. It appears you really will not know what side effects you will experience in advance of receiving the injection.
I had almost all of the side effects ( emotional flare up's, hot flashes, night sweats, weight gain etc etc ) while other guys in our support group had the same shot and experienced almost no reactions. Others had the same experience I "enjoyed" . Not sure if that helps you but did not want to offer you some insight and personal experience.