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Breast cancer chemoprevention: Drugs that reduce risk

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If you're at high risk of breast cancer, you may be able to improve your odds of staying cancer-free by taking certain medicines — an approach known as chemoprevention or preventive therapy.

Medications for breast cancer chemoprevention are the subject of much ongoing research.

Here's a look at what's known about each of these medications, including how they may work to prevent breast cancer and the possible side effects and health risks.