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.
Ibrance (palbociclib) is a capsule or tablet you take by mouth to treat certain types of breast cancer, specifically hormone receptor-positive, human epidermal growth factor 2-negative (HR+, HER2‑) advanced or metastatic breast cancer. It works by blocking specific proteins called CDK4/6 to help slow down the growth of cancer cells. You usually take it once a day for 21 days, and then don’t take it for 7 days, repeating this cycle every 28 days. Ibrance (palbociclib) is also used with other medications like an aromatase inhibitor, fulvestrant, or inavolisib. Side effects include low white blood cell counts, infections, nausea, 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.
Ibrance (palbociclib) with letrozole:
Ibrance (palbociclib) with fulvestrant:
Ibrance (palbociclib) with inavolisib and fulvestrant:
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