I am a young male (turning 25 soon) and I am considering using
Propeicia and CPA to reduce my overall upper body hair (mainly
back and upper arms). I was wondering if these medicines are
suitable for a young male and what effect if any could I expect
from the combination of these meds..

If anyone has tried either of these meds let me know of any progress
and more importantly any side-effects involved.

To use antiandrogens at levels required to suppress body hair growth, some men have unwnated side effects including sexual dysfunction, sterility, and breast growth.

You should speak with an endocrinologist and get a blood workup before undertaking this course of action.