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Postmenopausal women who have breast cancer that has metastasized may benefit from treatment with toremifene. This prescription medicine is designed for certain types of estrogen-sensitive breast cancers and works by preventing the tumors from growing. It comes as a tablet that is taken once daily. Side effects are possible and include hot flushes, nausea, and sweating.

What Is Toremifene?

Toremifene citrate (Fareston®) is a prescription medication approved to treat metastatic breast cancer in postmenopausal women who have estrogen receptor-positive or estrogen receptor-unknown tumors. Metastatic breast cancer is cancer that has spread beyond the breast to other areas of the body. Toremifene belongs to a group of medicines known as selective estrogen receptor modulators (SERMs).
(Click What Is Toremifene Used For? for more information on this topic, including possible off-label uses.)

Are There Side Effects?

Just like any medicine, toremifene can cause side effects. However, not everyone who uses the drug will experience problems. Most people tolerate it quite well.
If reactions do occur, in most cases, they are minor and either require no treatment or are treated easily by you or your healthcare provider. Serious side effects are less common.
Common side effects of toremifene include but are not limited to:
  • Hot flushes
  • Sweating
  • Nausea
  • Vaginal discharge.
(Click Toremifene Side Effects to learn more, including potentially serious side effects you should report immediately to your healthcare provider.)
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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