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.
Kisqali Femara Co-Pack is a combination medication used to treat certain types of breast cancer, specifically hormone receptor–positive, human epidermal growth factor 2-negative (HR+, HER2-) breast cancer. It contains two medications: Kisqali (ribociclib), a CDK4/6 inhibitor, and Femara (letrozole), an aromatase inhibitor. You take Kisqali once a day for 21 days, then take 7 days off, in a 28-day cycle. Femara is taken once a day with no breaks. Common side effects include feeling tired, nausea, and low white blood cell counts, which can make it easier to get infections.
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.
Early breast cancer
Advanced or metastatic breast cancer
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