if you can get Femara or Aromasin, i would prefer those. They are more effective than Arimidex in estrogen elimination and have some additional benefits: Femara raises IGF-1 levels vs. Arimidex which reduces them and Aromasin was shown to raise LH/FSH and is itself a light androgen, yet it eliminates 95% of estrogen vs. 90% with Femara or 80% with Arimidex.