Comparative Study of Oestradiol Suppression: Zoladex 10.8mg/3 Month vs. 3.6mg/Month in ER +ve EBC Pre-menopausal Patients

An Open-label, Randomized, Parallel Group, Multicentre Study to Compare Oestradiol Suppression Between ZOLADEX 10.8 mg Depot Given 3 Monthly and ZOLADEX 3.6 mg Depot Given Monthly in Pre-menopausal Patients With ER Positive Early Breast Cancer

The primary purpose of this study is to establish if a 10.8 mg dose of ZOLADEX given 3 monthly is non-inferior to a 3.6 mg dose of ZOLADEX given monthly in terms of oestradiol suppression in patients with oestrogen receptor positive early breast cancer.

Inclusion Criteria:

• Pre-menopausal women aged 20 years or over with histological/cytologically-confirmed ER +ve breast cancer who have undergone radical surgery and WHO performance status 0,1 or 2.

Exclusion Criteria:

• Evidence of metastatic disease, previous bilateral oophorectomy or radiotherapy to the ovaries, previous chemotherapy, breast surgery completed over 12 weeks before starting trial treatment, previous neo-adjuvant/adjuvant hormonal breast cancer therapy