Arimadex vs Aromasin. ? I've always used a Arimidex this time when I raised my testosterone I'm trying out Aromasin at 6.25 twice week. Assuming this is the same as .25 arimadex I'm a few weeks in and I'm feeling mood swings. Not in a very good mood. I'm getting conflicting answers online as to the half-life of Aromasin. Is it ok to take it 2wk or is it like the prop of Ai and eod is better ? Is Aromasin better eod