Arimadex (Anastrozole)

Product name : Arimadex (Anastrozole)

CAS : 120511-73-1

Molecular formula : C₁₇H₁₉N₅

Product description :
Anastrozole (INN) (marketed under the trade name Arimidex by AstraZeneca) is an aromatase-inhibiting drug approved for treatment of breast cancer after surgery, as well as for metastasis in both pre and post-menopausal women. The severity of breast cancer is increased by estrogen, as sex hormones cause hyperplasia, and differentiation at estrogen receptor sites. Anastrozole works by inhibiting the synthesis of estrogen. The patent on Arimidex by AstraZeneca expired 27 June 2010.The ATAC (Arimidex, Tamoxifen, Alone or in Combination) trial was an international randomised controlled trial of 9366 women with localized breast cancer who received either anastrozole, tamoxifen, or both for five years, followed by five years of follow-up. After more than 5 years the group that received anastrozole had significantly better clinical results than the tamoxifen group. The trial suggested that anastrozole is the preferred medical therapy for postmenopausal women with localized breast cancer that is estrogen receptor (ER) positive. Another study found that the risk of recurrence was reduced 40%, which also included an increased risk of bone fractures, and that ER negative patients benefited from switching to anastrozole.