Hormone Therapy for Breast Cancer

Hormone therapy is used to change the way hormones stimulate cancer growth. These medicines either block the effects hormones have on the cancer cells or block the production of the hormones.

If tests show that the breast cancer cells have estrogen and progesterone receptors (ER/PR-positive), hormone therapy may be used. Tamoxifen and aromatase inhibitors are the most commonly used hormonal therapies. Other hormonal therapies include progestins, such as megestrol (Megace), and antiestrogens, such as fulvestrant.

Is it an emergency?

If you or someone in your care has chest pains, difficulty breathing, or severe bleeding, it could be a life-threatening emergency. Call 9-1-1 or the local emergency number immediately.
If you are concerned about a possible poisoning or exposure to a toxic substance, call Poison Control now at 1-800-567-8911.

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