Do not use tamoxifen if you are pregnant. It could harm the unborn baby. Use a barrier form of birth control (such as a condom or diaphragm with spermicide) while you are using this medication and for at least 2 months after your treatment ends. You should not use tamoxifen if you are allergic to it, if you have a history of blood clots in your veins or your lungs, or if you are taking a blood thinner such as warfarin (Coumadin).
Before using this medicine, tell your doctor if you have liver disease, high triglycerides (a type of fat in the blood), a history of cataract, or a history of stroke or blood clot. Also tell your doctor if you if you are receiving chemotherapy or radiation treatment.
If you are taking tamoxifen to reduce your risk of breast cancer, you may need to take your first dose while you are having a menstrual period. You may also need to have a pregnancy test before you start taking this medicine, to make sure you are not pregnant. Follow your doctor's instructions.
Taking tamoxifen may increase your risk of uterine cancer, stroke, or a blood clot in the lung, which can be fatal. Talk with your doctor about your specific risks in taking this medication.
To make sure this medication is not causing harmful effects, your doctor may want you to have mammograms and to perform routine breast self-exams on a regular basis. Your liver function may also need to be tested. Visit your doctor regularly.
Before taking this medicine
You should not use tamoxifen if you are allergic to it.
You should not use tamoxifen to reduce your risk of breast cancer if you are also taking a blood thinner such as warfarin (Coumadin, Jantoven).
Do not take tamoxifen if you are pregnant. It could harm the unborn baby. Avoid becoming pregnant while you are using this medicine, and for at least 2 months after your treatment ends.
Hormonal contraception (such as birth control pills, injections, implants, skin patches, and vaginal rings) may not be effective enough to prevent pregnancy while taking tamoxifen. Use barrier or non-hormonal birth control (examples: condom, diaphragm with spermicide, or intrauterine device/IUD).
If you are taking tamoxifen to reduce your risk of breast cancer, you may need to take your first dose while you are having a menstrual period. You may also need to have a pregnancy test before you start taking tamoxifen, to make sure you are not pregnant. Follow your doctor's instructions.
Taking tamoxifen may increase your risk of uterine cancer, stroke, or a blood clot in the lung, which can be fatal. Talk with your doctor about your specific risks in taking this medicine.
To make sure tamoxifen is safe for you, tell your doctor if you have:
a history of stroke or blood clot;
liver disease;
high cholesterol or triglycerides (a type of fat in the blood);
a history of cataracts; or
if you are receiving chemotherapy or radiation.
It is not known whether tamoxifen passes into breast milk or if it could harm a nursing baby. This medicine has been shown to slow breast milk production. Do not breast-feed while taking tamoxifen.
