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Anastrozole: 7 things you should know

Anastrozole is not recommended when pregnant or breastfeeding, because it interferes with hormone levels in you and your baby. And there is not enough information available to say if it’s safe. Face dropping and difficulty speaking can be signs of a stroke, and sudden severe chest pain can be a sign of a heart attack.

  • These may contain ingredients similar to the hormone oestrogen and could stop anastrozole working as well as it should in treating your cancer.
  • However, some people find that they start to having periods again after taking anastrozole.
  • There are very few medicines that affect the way anastrozole works in the body.
  • Do not increase your dose or use this drug more often or for longer than prescribed.
  • Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist.
  • This is not a list of all drugs or health problems that interact with anastrozole.

This copyrighted material has been downloaded from a licensed data provider and is not for distribution, except as may be authorized by the applicable terms of use. You’ll soon start receiving the latest Mayo Clinic health information you requested in your inbox. This medicine is available only with your doctor’s prescription.

Skin changes

Anastrozole works by reducing the amount of oestrogen made in the body. It belongs to a group of drugs called aromatase inhibitors. Although it is not likely that a postmenopausal woman would be pregnant, anastrozole may harm an unborn baby.

Tell your doctor about all your current medicines and any medicine you start or stop using. Keep using birth control for at least 3 weeks after your last dose of Anastrozole 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.

Who can and cannot take anastrozole

Do not stop taking anastrozole without talking to your doctor. There are other drugs available to treat your condition. When filling your prescription, be sure to call ahead to make sure they carry it. You should not need a new prescription for this medication to be refilled. Your doctor will write the number of refills authorized on your prescription. Selected from data included with permission and copyrighted by First Databank, Inc.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances. 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. You may be more likely to have a broken bone while using anastrozole. Talk with your doctor about ways to keep your bones healthy. The most common reason for discontinuing anastrozole has been hot flashes, although the incidence of this is less than with tamoxifen.