April 24, 2014

Drug Factsheets

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DIN (Drug Identification Number)


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 is used to treat certain types of breast cancer (advanced breast cancer and early hormone-receptor-positive breast cancer) in women who are past menopause.

Your doctor may have suggested this medication for conditions other than those listed in these drug information articles. As well, some forms of this medication may not be used for all of the conditions discussed here. 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. You can reduce your risk of nausea or vomiting by taking your daily tablet after a meal.

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 of this medicine, do not take the missed dose at all and do not double the next one. Go back to your regular dosing schedule. If you have taken more than your normal dose, contact your doctor or nearest hospital.

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 anastrazole if you:

  • are allergic to anastrozole or any ingredients of the medication
  • are breast-feeding
  • are pregnant

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