Breast cancer drug may have serious risk

There's disturbing news about a drug commonly used to battle breast cancer. The hormone drug Tamoxifen is a standard treatment for estrogen receptive breast cancer, but a new study links long-term use of the drug to a rare and aggressive second form of breast cancer.

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Experts say the findings shouldn't stop breast cancer patients from taking Tamoxifen because of its proven benefits.

However, patients should be aware of the potential risks.

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