September 16, 2014
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Drug Factsheets

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Arimidex

(anastrozole)

DIN (Drug Identification Number)

02224135 ARIMIDEX 1MG TABLET

How does Arimidex work? What will it do for me?

Anastrozole belongs to the group of cancer-fighting medications known as antineoplastics, and specifically to the group of antineoplastics known as nonsteroidal aromatase inhibitors. It fights breast cancer by inactivating an enzyme known as aromatase. This prevents the enzyme from supplying the estrogen that allows certain types of breast cancers to grow.

Anastrozole can be used after surgery to treat postmenopausal women with hormone receptor-positive early breast cancer. Anastrozole can also be used to treat postmenopausal women with advanced breast cancer.

This medication may be available under multiple brand names and/or in several different forms. Any specific brand name of this medication may not be available in all of the forms or approved for all of the conditions discussed here. As well, some forms of this medication may not be used for all of the conditions discussed here.

Your doctor may have suggested this medication for conditions other than those listed in these drug information articles. If you have not discussed this with your doctor or are not sure why you are taking this medication, speak to your doctor. Do not stop taking this medication without consulting your doctor.

Do not give this medication to anyone else, even if they have the same symptoms as you do. It can be harmful for people to take this medication if their doctor has not prescribed it.

How should I use Arimidex?

The recommended dose of anastrozole is 1 mg once daily, at the same time each day, taken with or without food. Many things can affect the dose of medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.

It is important to take this medication exactly as prescribed by your doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are not sure what to do after missing a dose, contact your doctor or pharmacist for advice.

You should keep your tablets in the package they came in and store them at room temperature in a dry place. Keep it out of the reach of children.

Do not dispose of medications in wastewater (e.g. down the sink or in the toilet) or in household garbage. Ask your pharmacist how to dispose of medications that are no longer needed or have expired.





What form(s) does Arimidex come in?

Each white, biconvex, film-coated tablet, intagliated with "Adx 1" on one side and a logo on the other side ("A" for ARIMIDEX), contains anastrozole 1 mg. Nonmedicinal ingredients: hypromellose, lactose monohydrate, macrogol 300, magnesium stearate, povidone, sodium starch glycolate, and titanium dioxide.

Who should NOT take Arimidex?

Do not use anastrozole if you:

  • are allergic to anastrozole or any ingredients of the medication
  • are allergic to any other aromatase inhibitor medications (e.g., letrozole, exemestane)
  • are breast-feeding
  • are pregnant

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