arimidex is an estrogen blocker
try doing a search on this board with the key word arimidex and you will find a wealth of information.. I have posted alot of this very subject
Many variables will affect you if you use arimidex such as your current hormone levels, birth control, it could especially when combined with var, raise your cholesterol levels and the main reason to use with caution is the rebound when you come off...
Now var and hgh is in my opinion a killer cycle and what I would choose to do rather than arimidex. I personally stay away from estrogen blockers because getting lean to me is not worth the trouble of highly imbalanced hormones when there are easier less traumatic ways to do it
Best of luck
super