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  • Basic Info
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Generic: tamoxifen
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It is commonly used to treat breast cancer
               



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What is this medicine?

TAMOXIFEN (ta MOX i fen) blocks the effects of estrogen. It is commonly used to treat breast cancer. It is also used to decrease the chance of breast cancer coming back in women who have received treatment for the disease. It may also help prevent breast cancer in women who have a high risk of developing breast cancer.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:
  • blood clots
  • blood disease
  • cataracts or impaired eyesight
  • endometriosis
  • high calcium levels
  • high cholesterol
  • irregular menstrual cycles
  • liver disease
  • stroke
  • uterine fibroids
  • an unusual or allergic reaction to tamoxifen, other medicines, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast- feeding

How should I use this medicine?

Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. You can take it with or without food. Take your medicine at regular intervals. Do not take your medicine more often than directed. Do not stop taking except on your doctor's advice.

A special MedGuide will be given to you by the pharmacist with each prescription and refill. Be sure to read this information carefully each time.

Talk to your pediatrician regarding the use of this medicine in children. While this drug may be prescribed for selected conditions, precautions do apply.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What may interact with this medicine?

  • aminoglutethimide
  • bromocriptine
  • chemotherapy drugs
  • female hormones, like estrogens and birth control pills
  • letrozole
  • medroxyprogesterone
  • phenobarbital
  • rifampin
  • warfarin

What should I watch for while using this medicine?

Visit your doctor or health care professional for regular checks on your progress. You will need regular pelvic exams, breast exams, and mammograms. If you are taking this medicine to reduce your risk of getting breast cancer, you should know that this medicine does not prevent all types of breast cancer. If breast cancer or other problems occur, there is no guarantee that it will be found at an early stage.

Do not become pregnant while taking this medicine or for 2 months after stopping this medicine. Stop taking this medicine if you get pregnant or think you are pregnant and contact your doctor. This medicine may harm your unborn baby. Women who can possibly become pregnant should use birth control methods that do not use hormones during tamoxifen treatment and for 2 months after therapy has stopped. Talk with your health care provider for birth control advice.

Do not breast feed while taking this medicine.

               
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