For tiredness, you need to get on a good exercise program: cardio + weight/resistance training. The resistance training will help build back your muscles you are losing through ADT. More muscles will help mitigate the fatigue.
For erections, there is the pump or injections. I guess some ADT guys can do ok with oral meds but the pump or trimix is only thing that works for me.
Age 52; dx at 50, PSA 54.9
Nerve sparing surgery/
open, 2010; removed 14 lymph nodes
Pathology report: T3bN0MX, SVI, neg margin, Gleason 9
Adjuvant HT, up to 36 months: 15 month mark now
All HT SE (including total ED)
Finished Adjuvant RT incl lymph nodes, 9/2011
Undetectable PSA so far