Head-to-head comparisons of medication uses, side effects, warnings, and more.
Kisqali (ribociclib) is a medication used to treat certain types of breast cancer, specifically hormone receptor–positive, human epidermal growth factor 2-negative (HR+, HER2-) breast cancer. It belongs to a drug class called CDK4/6 inhibitors, which help slow or stop cancer cells from growing. You typically take a tablet by mouth once a day for 21 days, then take 7 days off, repeating this 28-day cycle. It’s often taken together with other hormone treatments, like aromatase inhibitors or fulvestrant. Common side effects include feeling tired, nausea, and low white blood cell counts, which can make it easier to get infections.
Verzenio (abemaciclib) is an oral medication used to treat certain types of breast cancer. It's FDA approved for hormone receptor-positive, human epidermal growth factor 2-negative (HR+, HER2‑) breast cancer, including early and advanced or metastatic stages. This medication belongs to a group called CDK4/6 inhibitors, which slow down the growth of cancer cells. It comes as a pill that’s taken by mouth twice a day, without breaks. You might take Verzenio (abemaciclib) on its own or with hormone therapy. Common side effects include diarrhea, low white blood cell counts, and tiredness.
Early breast cancer
Advanced or metastatic breast cancer
Note: Side effects listed above were reported in studies where people took Kisqali (ribociclib) with another hormone medication.
Note: Side effects listed above are from a study of Verzenio (abemaciclib) used alone to treat metastatic breast cancer.
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