FARESTON, generically known as toremifene, is a nonsteroidal antiestrogen medication primarily used in the treatment of advanced breast cancer in postmenopausal women. It operates by binding to estrogen receptors on tumors and other tissue targets, producing a mixed estrogenic and antiestrogenic effect, which in the context of breast cancer, tends to inhibit tumor growth. FARESTON is particularly indicated for patients with estrogen receptor-positive tumors, where it can significantly impede the cancer's ability to use estrogen for growth. This medication is taken orally and is often part of a comprehensive treatment plan that may include other forms of therapy depending on the patient's specific condition and response to treatment. Like all medications, FARESTON can cause side effects, and its use should be closely monitored by a healthcare professional.