Drugs >  Tamoxifen
Tamoxifen
Pronunciation
Brand Names
Foreign Brand Names
Therapeutic Categories
Reasons not to take this medicine
What is this medicine used for?
How does it work?
How is it best taken?
What do I do if I miss a dose?
What are the precautions when taking this medicine?
What are the common side effects of this medicine?
What should I monitor?
Reasons to call healthcare provider immediately
How should I store this medicine?
General statements

Pronunciation
(ta MOKS i fen)

Brand Names
Nolvadex®

Foreign Brand Names
Alpha-Tamoxifen® (Canada); Apo-Tamox® (Canada); Bilem (Mexico); Cryoxifeno (Mexico); Novo-Tamoxifen (Canada); Tamofen® (Canada); Tamone® (Canada); Tamoxan (Mexico); Taxus (Mexico)

Therapeutic Categories
Antineoplastic Agent, Miscellaneous

Reasons not to take this medicine

  • If you have an allergy to tamoxifen or any other part of the medicine.


What is this medicine used for?

  • This medicine is used in the treatment of breast cancer in women and men. It is also for the prevention of breast cancer in women at increased risk of developing the disease. It may reduce the risk of getting cancer in the other breast after one has already developed cancer. It may also decrease the risk of the cancer spreading in a certain type of local breast cancer (ductal carcinoma in situ ) in women.
  • It may be used to treat other forms of cancer.
  • It may be used to induce ovulation.


How does it work?

  • Tamoxifen prevents estrogen from feeding estrogen-dependent cancer cells as in many forms of breast cancer. This decreases recurrence or spread of the cancer and lengthens life in these patients.


How is it best taken?

  • Take with or without food. Take with food if this medicine causes an upset stomach.


What do I do if I miss a dose?

  • Take a missed dose as soon as possible.
  • If it is almost time for the next dose, skip the missed one. Return to your regular schedule.
  • Do not take a double dose or extra doses.


What are the precautions when taking this medicine?

  • Limit alcohol intake (includes wine, beer, and liquor). May increase risk of breast cancer.
  • If you are taking this medicine to prevent breast cancer, tell healthcare provider if you have ever had any circulation problems or blood clots in your legs, arms, or lungs.
  • There may be an increased risk of endometrial or uterine cancer.
  • Tell healthcare provider if you are allergic to any medicine. Make sure to tell about the allergy and how it affected you. This includes telling about rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, throat; or any other symptoms involved.
  • Do not use in pregnancy and do not get pregnant. Use birth control that you can trust while taking this medicine.
  • Do not use if you are breast-feeding.


What are the common side effects of this medicine?

  • Hot flashes and flushing. This usually improves in a few weeks.
  • Nausea or vomiting. Small frequent meals, frequent mouth care, sucking hard candy, or chewing gum may help.
  • Irregular menses and vaginal discharge.
  • Changes in sexual ability or desire. This can return to normal after medicine is stopped. Talk with healthcare provider about other medicines without this side effect.


What should I monitor?

  • Periodic breast (monthly self-exam) and gynecologic exams are important.
  • Follow up with healthcare provider.


Reasons to call healthcare provider immediately

  • Signs of a life-threatening reaction. These include wheezing; tightness in the chest; fever; itching; bad cough; blue skin color; fits; swelling of face, lips, tongue, or throat.
  • Menstrual changes. Abnormal vaginal bleeding, change in vaginal discharge, pelvic pain or pressure.
  • Severe nausea, vomiting, and/or diarrhea.
  • Swelling/pain of a leg or arm.
  • Sudden shortness of breath, difficulty breathing, chest pain.
  • Any rash.


How should I store this medicine?

  • Store in a tight, light-resistant container at room temperature.


General statements

  • Do not share your medicine with others and do not take anyone else's medicine.
  • Keep all medicine out of the reach of children and pets.
  • Keep a list of all your medicines (prescription, herbal/supplements, vitamins, over-the-counter) with you. Give this list to healthcare provider (doctor, nurse, pharmacist, physician assistant).
  • Talk with healthcare provider before starting any new medicine, including over-the-counter or natural products (herbs, vitamins).


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