Brand Names

Fareston® (There may be other brand names for this medication.)

How is it Administered?

Toremifene is a pill, taken by mouth. Take it with a full glass of water at about the same time every day. You can take it with or without food.

Why Am I Taking Toremifene?

Toremifene is used to treat metastatic breast cancer in women who are postmenopausal (stopped having menstrual periods) and whose tumors are estrogen receptor positive (ESR+).

How Does it Work?

Your body makes hormones to carry messages to “target” organs and tissues. Hormones are made in one gland, and then travel through the blood to their targets.

The main female hormone is estrogen. There are many cells in your body that have estrogen receptors on them. Estrogen attaches to the receptors and causes the cells to act in a particular way.

Estrogen has been shown to cause the growth of some types of cancer cells. Toremifene is an anti-estrogen; it binds to the estrogen receptors on the cancer cells and stops estrogen from going into the cell. This eventually causes the cell to die.

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