Arimidex (Anastrozole) 1mg 28 tablets AstraZeneca

The main advantage when choosing Arimidex over a SERM, such as Nolvadex, is its ability to block the aromatase enzyme. In other words, it helps prevent estrogen production at the source. Nolvadex or Tamoxifen will block estrogen receptors without inhibiting production at the source. Which means that the estrogen hormone is still circulating in your body when using a SERM.