That makes sense since nolvadex blocks existing estrogen from binding with tissue receptors, and arimidex prevents free test from aromatising into estrogen. THe nolva has basically an immediate effect, where the arimi has an immediate effect on aromatising, but not on reducing or controlling existing levels of estrogen in your body. hmmmm....I hope I said that so it made sense....
In any case, I've definitely had some screwy estrogen level issues lately. I upped my doseages to some very high levels at the end of my last bulking cycle. I didn't know how much arimidex or nolvadex to take, so I was basically just upping until I got rid of the itchy nips. I was a total fucking mess for about 2 weeks. Didn't know whether to be pissed off, cry, beat the shit out of someone, or go kill myself. It went back and forth for about 2 weeks, then I found the right levels of arimi/nolva to keep the estro in check.