A few general comments without knowing specific details:
Yes, it is common to be given medication in addition to Lupron; it's wise to do so especially at the start of treatment to reduce initial problems.
The aim of hormone treatment is to reduce testosterone production and levels which has the obvious effect of reduced libido. Some men tolerate the treatment well, while others have acute side effects like hot flashes.
Any acute side issues often reduce over time, and can be helped by lifestyle, remaining active, exercise, diet, nutrition and supplements, which will also assist potential long term issues like bone density problems.
If severe side effects continue, a change in medication can sometimes help as some men tolerate one kind of medication better than another.
I have two friends now doing well on hormone treatment. One had bone mets when he started treatment in December 2006. His PSA has reduced to about 1, he remains very active, he no longer has bone pain, and his bone hot spots from early scans were not evident on his recent scans.
I always suggest the book by Dr Charles Myers as essential reading on Hormonal Therapy, and the yananow site mentors experiences section for specific stories from men who have used the treatment.