Letro shuts down 98% of estrogen formation, Arimidex 80%. Adex better long term cause too little estrogen is very bad for cholesterol profiles, joints, etc. I am not sure of the reprecussions of taking either with your specifics and how they may react. They are both anti-cancer drugs for estrogen fueled cancers. The letro will know E2 through the floor. As far a libido, too much OR TOO LITTLE estrogen will cause erection difficulty.
TRT guys shoot for .5 mgs
arimidex every other day to get good balance. Read the physicians prescribing info at manufacturer's web site.