I recently started TRT and feel great! My doc had me on arimidex .25 ED to ensure that my very mild existing puberty related gyno wouldn't flare up. Right nipple has felt sore ever since I started TRT. New blood work says my E is at 9. So he wants to switch me to tamaxofine. 20mg a day and wants me to stop arimidex. Should I keep taking the arimidex and taper off of it as I start the tamaxofine? Do I even need to worry or will the tamaxofine kick in quickly?