Hormone therapy
Hormone therapy (also called endocrine therapy or hormone-blocking therapy) is used to treat hormone receptor positive breast cancers (cancers with oestrogen and/or progesterone receptor) that likely require hormones to grow.
Hormone therapy can be given orally (such as the medication Tamoxifen), or through injections (such as the drug Fulvestrant, which may be used to treat metastatic breast cancer).
Side effects may include menstrual changes, hot flushes, and night sweats; Tamoxifen can also increase the risk of blood clots, although blood clots are rare.