Ribociclib (trade name Kisqali) is an anticancer drug used in the treatment of advanced or metastatic breast cancer. It is a kinase inhibitor that works by blocking the action of an enzyme called cyclin-dependent kinase 4/6 (CDK4/6) which is involved in the regulation of cell division. Ribociclib is used in combination with other drugs, such as letrozole, and is approved for the treatment of postmenopausal women who have a certain type of breast cancer that is hormone receptor positive, HER2 negative.
Ribociclib, also known by the brand name Kisqali, is a prescription medication used to treat a specific type of breast cancer. Here's a breakdown of the key points about Ribociclib:
What it treats:
- Hormone receptor-positive, HER2-negative advanced or metastatic breast cancer: This type of breast cancer is fueled by hormones (estrogen or progesterone) and does not have high levels of a protein called HER2. Ribociclib is used in combination with other medications, not as a standalone treatment.
How it works:
- Targets cell growth: Ribociclib belongs to a class of drugs called cyclin-dependent kinase (CDK) 4/6 inhibitors. These drugs work by blocking proteins (CDK4 and CDK6) that are essential for the uncontrolled growth and division of cancer cells. By inhibiting these proteins, Ribociclib helps slow down or stop the spread of cancer cells.
Who can take it:
- Postmenopausal women: Ribociclib is typically used for postmenopausal women with advanced or metastatic breast cancer.
- Younger women: In some cases, younger women with advanced breast cancer who have completed menopause induced by medication may also be candidates for Ribociclib.
Dosage and administration:
- Ribociclib comes as tablets taken orally, typically once daily on a specific schedule with an extended break period within a cycle (e.g., three weeks on, one week off). The exact dosage and schedule will be determined by your doctor.
Important considerations:
- Side effects: Common side effects of Ribociclib include low blood cell counts (which can increase your risk of infections), fatigue, nausea, diarrhea, hair loss, and loss of appetite. Your doctor will monitor these side effects and may adjust the dosage or recommend supportive medications if needed.
- Not for everyone: Ribociclib is not suitable for people with certain medical conditions, allergies to the medication, or pregnant or breastfeeding women.
- Interactions with other medications: Ribociclib can interact with other medications, including some herbal supplements. Inform your doctor about all medications you take before starting Ribociclib.