It does take some experimentation to know how much you need to keep the boobs at bay on any given cycle. I'll wait for the first sign of symptoms, then start the arimidex(liquidex) at .5/d and take a few nolvadex to block the estrogen thats already there. After a few days of both, I'll drop the nolva, and drop back to .25/day on the arim. Then after a few more days, I'll drop back to .25 EOD and wait to see if any symptoms come back. If not, then I know I found the sweet spot for that given cycle/test doseage. If so, then I up the arim back to .25ED, and hit the nolva right for a day or two. On my last bulking cycle, I ended up sticking with .5mg/day throughout. Bottom line is that it will vary from cycle to cycle if you change your doseages.