Tag: Estrogen suppression

Within 24 hours of the first dose, Arimidex (anastrozole) can reduce the body's estrogen levels by approximately 70%. This rapid hormonal change is the initial action behind the core question: **Does Arimidex work right away?**

In studies involving postmenopausal women with breast cancer, letrozole demonstrated a higher overall response rate as a second-line treatment compared to anastrozole, indicating it is a more potent estrogen suppressor. This article explores whether is letrozole stronger than anastrozole and if this difference translates to better clinical outcomes.