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Exemestane Tablets

Exemestane is a medication that treats some types of breast cancer by blocking production of the hormone estrogen. Certain types of cancer depend on estrogen to grow. This medication comes in a tablet form that you can take by mouth with a glass of water as directed.

What is this medication?

EXEMESTANE (ex e MES tane) treats breast cancer. It works by decreasing the amount of estrogen hormone your body makes, which slows or stops breast cancer cells from spreading or growing.

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This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.

COMMON BRAND NAME(S): Aromasin

What should I tell my care team before I take this medication?

They need to know if you have any of these conditions:

  • An unusual or allergic reaction to exemestane, other medications, foods, dyes, or preservatives
  • Pregnant or trying to get pregnant
  • Breastfeeding

How should I use this medication?

Take this medication by mouth with a glass of water. Take it as directed on the prescription label at the same time every day. Take it after a meal. Keep taking it unless your care team tells you to stop.

Talk to your care team about the use of this medication in children. Special care may be needed.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

If you miss a dose, skip it. Take your next dose at the normal time. Do not take extra or 2 doses at the same time to make up for the missed dose.

What may interact with this medication?

  • Certain medications for seizures, such as carbamazepine, phenobarbital, phenytoin
  • Rifampin
  • St. John's wort

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

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What should I watch for while using this medication?

Visit your care team for regular checks on your progress.

If you experience hot flashes or sweating while taking this medication, avoid alcohol, smoking, and caffeine. This may help to decrease these side effects.

Using this medication for a long time may weaken your bones. The risk of bone fractures may be increased. Talk to your care team about your bone health.

Talk to your care team if you may be pregnant. Serious birth defects can occur if you take this medication during pregnancy and for 1 month after the last dose. You will need a negative pregnancy test before starting this medication. Contraception is recommended while taking this medication and for 1 month after the last dose. Your care team can help you find the option that works for you.

Do not breastfeed while taking this medication and for 1 month after the last dose.

This medication may cause infertility. Talk to your care team if you are concerned about your fertility.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible:

  • Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat

Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):

  • Fatigue
  • Headache
  • Hot flashes
  • Joint pain
  • Nausea
  • Sweating
  • Trouble sleeping

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Where should I keep my medication?

Keep out of the reach of children and pets.

Store at room temperature between 20 and 25 degrees C (68 and 77 degrees F). Get rid of any unused medication after the expiration date.

To get rid of medications that are no longer needed or have expired:

  • Take the medication to a medication take-back program. Check with your pharmacy or law enforcement to find a location.
  • If you cannot return the medication, ask your pharmacist or care team how to get rid of this medication safely.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

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Note: Introduction and Additional Common Questions written and medically approved by Cleveland Clinic professionals.

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