Preventive Treatments

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 chemoprophylaxis.

Medication options for breast cancer chemoprevention include tamoxifen or raloxifene (Evista). These medications currently used for breast cancer chemoprevention — as well as new medications that might be future chemoprevention options — 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.