I'm male on testosterone therapy and my estrogen is double what it should be?

Male estrogen: Testosterone may be converted to estrogen by an enzyme called aromatase, which is produced in adipose (fat cells). This can be treated - I suggest that you consult a urologist who is experienced in managing men with low testosterone.

Go see your doctor: The good news is that your doc checked. Before you look for more drugs eg aromatase inhibitor, in a domino fashion, ask yourself if you've noticed any side effects from excess estrogen. If not, you can take a wait & see approach. Or take less testosterone more frequently (that way you won't waste excess testosterone). Or change your method of therapy. But all this must be discussed w/your doc.