In my 10 week period of Test P 100 mg EOD & Mast P 100 mg EOD, I introduced ZPHC 1MG Anastrozole Tabs. My body is very vulnerable to estrogen building up when taking some form of testosterone. I began to show symptoms of elevated levels of estrogen about week 3 of my period. Soreness / tendency on nipples in particular. I immediately drew blood and confirmed that this was true. I started to take 1 mg of EOD with arimadex. I encountered exhaustion and tiredness throughout the first week. All signs of elevated estrogen levels were gone by close to week 2 of taking arimadex, and labs confirmed this to be true at the beginning of week 10. After I completed my period, Arimadex ran 1 week Eod.