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Details with Side Effects
Vaginal bleeding has been reported in patients using FARESTON. Patients should be informed about this and instructed to contact their physician if such bleeding occurs.
Premenopausal women using FARESTON should use nonhormonal contraception during treatment and should be apprised of the potential hazard to the fetus should pregnancy occur [see WARNINGS AND PRECAUTIONS].
Patients with bone metastases should be informed about the typical signs and symptoms of hypercalcemia and instructed to contact their physician for further assessment if such signs or symptoms occur.
Patients who must take medications known to prolong the QT interval, or potent CYP3A4 inhibitors, should be informed of the effect of toremifene on QT interval. Toremifene has been shown to prolong the QTc interval in a dose-related manner [see BOXED WARNING, WARNINGS AND PRECAUTIONS, and CLINICAL PHARMACOLOGY].
Specific interactions with foods that inhibit CYP3A4, including grapefruit juice, have not been studied but may increase toremifene concentrations. Patients should avoid grapefruit products and other foods that are known to inhibit CYP3A4 during FARESTON treatment.
Certain other medicines, including over-the-counter medications or herbal supplements (such as St. John's Wort) and toremifene, can reduce concentrations of coadministered drugs [see DRUG INTERACTIONS].
Last reviewed on RxList: 6/3/2011
This monograph has been modified to include the generic and brand name in many instances.
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