Faslodex (fulvestrant) is an anti-estrogen medication. It works by blocking the actions of estrogen in the body. Certain types of breast cancer use estrogen to grow and multiply in the body.
Faslodex is used to treat a certain type of hormone-related breast cancer in postmenopausal women, when the cancer has spread to other parts of the body after treatment with anti-estrogen medication.
Faslodex is also used together with a medicine called palbociclib (Ibrance), to treat certain hormone-related breast cancer that has progressed or spread after treatment with hormonal therapy.