What does risk-reducing endocrine therapy treat?

This approach is preventive rather than a treatment for a tumour already diagnosed. It is considered for some people whose breast cancer risk is raised by findings such as lobular carcinoma in situ, a strong family history, or an inherited BRCA gene mutation. A risk discussion considers age, menopausal status, personal history, bone health, blood-clot history, and other medicines.

Tamoxifen is one endocrine medicine used in risk reduction. It blocks oestrogen signals in breast tissue. The choice and duration are individual, and the medicine is not suitable for everyone. A clinician should explain expected benefits alongside possible effects such as hot flushes, menstrual changes, or clot-related symptoms.

Ask for a formal breast-risk assessment before starting medicine. Share your family history, previous biopsies, pregnancy plans, menstrual status, and any history of clots or stroke. Continue the screening plan recommended for your risk level; preventive medicine does not replace breast awareness or scheduled imaging.

Seek urgent care for sudden chest pain, trouble breathing, coughing blood, one-sided leg swelling, or sudden weakness while taking endocrine therapy. Report unusual vaginal bleeding, persistent severe headaches, or new breast changes promptly so they can be assessed.

What makes my breast cancer risk higher? What benefit might this medicine offer me? Which side effects require urgent help? How will pregnancy plans, contraception, and screening affect the decision?