Arimidex For Treating Low Testosterone Levels
I have seen on several occasions men who have low testosterone levels who are on hormone replacement therapy and yet fail to improve their libido, energy level, or their erections.

One explanation is that some of the testosterone is converted to estrogen which is the female hormone.  If men fail to respond to testosterone replacement therapy for low testosterone, then it is important to check the estrogen level (estradiol) and if this is elevated then the man will need to add an estrogen lowering medication, commonly Arimidex (anastrozole). It’s from the class of medications called aromatase inhibitors, which essentially block the conversion of testosterone to estrogen.

It helps by forcing testosterone output to remain high while keeping estrogen levels low.  The dosage is 0.25mg every third day.