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Brand name: Kisqali

Chemical name: Ribociclib, formerly called LEE011

Class: Cyclin-dependent kinase 4/6 inhibitor. Ibrance and Verzenio are other cyclin-dependent kinase 4/6 inhibitors used to treat breast cancer.

How it works: A kinase is a type of protein in the body that helps control cell division. Kisqali works by inhibiting the kinase and stopping cancer cells from dividing and growing.

Uses: Kisqali is used in combination with an aromatase inhibitor or tamoxifen to treat advanced-stage, estrogen-receptor-positive, HER2-negative breast cancer that hasn’t been treated with hormonal therapy before in premenopausal or postmenopausal women. Arimidex, Aromasin, and Femara are aromatase inhibitors.

How it’s given: Kisqali is a pill taken by mouth.

Side effects:

Read more about Kisqali.

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