There is little point worrying about the side effects before he gets them - thousands of men across the UK cope just fine on HT, not everyone has all side effects and if he really hates it, he can always stop. Perhaps best to only have the 1 month injections to begin with, rather than the 3 month ones, just until he sees how he gets on. The sad fact is that, if he doesn't have the hormone treatment, he is going to struggle much more - the symptoms of uncontrolled cancer are not pleasant and many of the side effects are ultimately the same as for HT - pain, loss of libido, loss of mobility, odema, fatigue.