- This drug may raise the chance of very bad and sometimes deadly side effects like stroke, blood clots, or endometrial or uterine cancer.
- It is used to treat breast cancer.
- It is used to lower the chance of breast cancer in women with a higher chance of getting it. It may lower the chance of getting cancer in the other breast after one has cancer.
- It may be given to you for other reasons. Talk with the doctor.
- If you have an allergy to tamoxifen or any other part of this drug.
- If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
- If you have blood clots or have had blood clots in the past.
- If you are taking any of these drugs: Anastrozole or warfarin.
- If you are breast-feeding. Do not breast-feed while you take this drug.
- Tell all of your health care providers that you take this drug. This includes your doctors, nurses, pharmacists, and dentists.
- Have blood work checked as you have been told by the doctor. Talk with the doctor.
- Low blood cell counts have happened with this drug. If blood cell counts get very low, this can lead to bleeding problems, infections, or anemia. Call your doctor right away if you have signs of infection like fever, chills, or sore throat; any unexplained bruising or bleeding; or if you feel very tired or weak.
- Call your doctor right away if you have signs of a blood clot like chest pain or pressure; coughing up blood; shortness of breath; swelling, warmth, numbness, change of color, or pain in a leg or arm; or trouble speaking or swallowing.
- This drug may raise the chance of getting cataracts or the need to have cataract surgery. Talk with the doctor.
- Be sure to have regular breast exams. Your doctor will tell you how often to have these. You will also need to do breast self-exams as your doctor has told you. Talk with your doctor.
- Women taking this drug need to be sure to have regular gynecology check-ups. Your doctor will tell you how often to have these. Talk with your doctor.
- If you are taking warfarin, talk with your doctor. You may need to have your blood work checked more closely while you are taking it with this drug.
- This drug may stop you from having a period (menstrual bleeding) for some time. This is not a method of birth control.
- This drug may cause harm to the unborn baby if you take it while you are pregnant.
- Use birth control that does not have hormones in it like a condom. Do this for as long as you take this drug and for 2 months after you stop taking it.
- If you get pregnant while taking this drug or within 2 months after your last dose, call your doctor right away.
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Signs of high calcium levels like weakness, confusion, feeling tired, headache, upset stomach and throwing up, hard stools (constipation), or bone pain.
- Signs of a urinary tract infection (UTI) like blood in the urine, burning or pain when passing urine, feeling the need to pass urine often or right away, fever, lower stomach pain, or pelvic pain.
- Weakness on 1 side of the body, trouble speaking or thinking, change in balance, drooping on one side of the face, or blurred eyesight.
- Change in eyesight.
- A lump in the breast or breast soreness.
- Low mood (depression).
- Swelling in the arms or legs.
- Any skin change.
- Very bad headache.
- A burning, numbness, or tingling feeling that is not normal.
- Liver problems have rarely happened with this drug. Sometimes, this has been deadly. Call your doctor right away if you have signs of liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain, light-colored stools, throwing up, or yellow skin or eyes.
- If you are a woman, call your doctor right away if you have pain when passing urine, pelvic pain or pressure, period (menstrual) changes like no period, vaginal bleeding that is not normal, or vaginal discharge.
- Some men have had sexual problems when taking this drug. These include lowered interest in sex and not able to get an erection. Call your doctor right away if you have sexual problems when taking this drug.
- Hot flashes.
- Upset stomach or throwing up.
- Weight gain or loss.
- Feeling tired or weak.
- Back pain.
- Bone pain.
- Muscle or joint pain.
- Take with or without food.
- To gain the most benefit, do not miss doses.
- Keep taking this drug as you have been told by your doctor or other health care provider, even if you feel well.
- If you are able to get pregnant, start taking this drug during your period (menstrual) cycle. You may need to have a pregnancy test before starting this drug. Talk with your doctor.
- Swallow whole with some water or other drink.
- Only use the measuring device that comes with this liquid drug.
- Take a missed dose as soon as you think about it.
- If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
- Do not take 2 doses at the same time or extra doses.
- Store at room temperature.
- Protect from heat.
- Store at room temperature. Do not refrigerate or freeze.
- Store in original container.
- Throw away any part not used after 3 months.
- Protect from light.
- Store in a dry place. Do not store in a bathroom.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
- If your symptoms or health problems do not get better or if they become worse, call your doctor.
- Do not share your drugs with others and do not take anyone else’s drugs.
- Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
- Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
- Some drugs may have another patient information leaflet. If you have any questions about this drug, please talk with your doctor, nurse, pharmacist, or other health care provider.
- If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.