Arimidex

Generic Name: anastrozole (an AS troe zole)
Brand Names: Arimidex

What is Arimidex?

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Arimidex lowers estrogen levels in postmenopausal women, which may slow the growth of certain types of breast tumors that need estrogen to grow in the body.

Arimidex is used to treat breast cancer in postmenopausal women. It is often given to women whose cancer has progressed even after taking tamoxifen (Nolvadex, Soltamox).

Arimidex may also be used for other purposes not listed in this medication guide.

Important information about Arimidex

FDA pregnancy category D. This medication can cause harm to an unborn baby. Do not use Arimidex without telling your doctor if you are pregnant. It could harm the unborn baby. Use effective birth control, and tell your doctor if you become pregnant during treatment.

You may need to take a pregnancy test before using Arimidex, to make sure you are not pregnant.

You also should not use this medication if you are breast-feeding a baby, or if you are allergic to anastrozole.

Before using Arimidex, tell your doctor if you have severe liver or kidney disease, or if you have not yet completed menopause. If you have any of these conditions, you may need a dose adjustment or special tests to safely take this medication.

You may need to keep taking Arimidex for up to 5 years. Follow your doctor's instructions.

Arimidex may not work as well if you take it together with tamoxifen or an estrogen medication. Before you start taking this medication, tell your doctor if you also take tamoxifen or estrogen.

Before taking Arimidex

You should not use this medication if you are allergic to anastrozole, or if you are pregnant or breast-feeding.

Before using Arimidex, tell your doctor if you are allergic to any drugs, or if you have:

severe liver disease;
severe kidney disease; or
not yet completed menopause.

If you have any of these conditions, you may need a dose adjustment or special tests to safely take Arimidex.

You may need to take a pregnancy test before using Arimidex, to make sure you are not pregnant.

It is not known whether Arimidex passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.

How should I take Arimidex?

Take this medication exactly as prescribed by your doctor. Do not take it in larger amounts or for longer than recommended. Follow the directions on your prescription label.

Arimidex is usually taken once per day. You may need to keep taking take this medication for up to 5 years. Follow your doctor's instructions.

Store Arimidex at room temperature away from moisture and heat.

What happens if I miss a dose?

Take the missed dose as soon as you remember. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention if you think you have used too much of this medicine.

Overdose symptoms may include stomach pain, nausea, vomiting, or blood in your stools.

What should I avoid while taking Arimidex?

Arimidex can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.

Arimidex side effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have any of these serious side effects:

swollen glands;
a bone fracture; or
swelling in your hands or feet;

Less serious side effects may include:

hot flashes;
joint pain or stiffness;
weakness;
sore throat;
depression, mood changes;
nausea; or
back pain, bone pain.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.

What other drugs will affect Arimidex?

Arimidex may not work as well if you take it together with tamoxifen or an estrogen medication. Before you start taking this medication, tell your doctor if you also take tamoxifen or estrogen.

There may be other drugs that can interact with Arimidex. Tell your doctor about all your prescription and over-the-counter medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start a new medication without telling your doctor.

Where can I get more information?

Your pharmacist can provide more information about Arimidex.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
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