You could ask about switching to one of the GnRH Agonists - Zoladex, Prostap, or Decapeptyl.
Degarelix is slightly different in being a GnRH Antagonist, the main feature of which is it starts working very quickly when you first start on it. However, having started, you could now switch. It is also sometimes used for people with cardio issues, as it has less significant side-effects in that respect. The others all last longer too, so you wouldn't need monthly injections.
Something you might discuss with your oncologist.