Does Ribociclib Interact with Letrozole And Ribociclib?
Ribociclib and Letrozole And Ribociclib have a major drug interaction according to U.S. FDA drug labeling data. 7 DRUG INTERACTIONS Ribociclib CYP3A4 Inhibitors: Avoid concomitant use of KISQALI FEMARA CO-PACK with strong CYP3A inhibitors. ( 7.4 ) 7.1 Drugs That May Increase Ribociclib Plasma Concentrations CYP3A4 Inhibitors Coadministration of a strong CYP3A4 inhibitors increases ribociclib exposure [see Clinical Pharmacology (12.3)] . Increased ribociclib concentrations may increase the incidence and severity of adverse reactions, including QTcF prolongation [see Warnings and Precautions (5.3)] . Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.
- Severity
- Major
- Management
- Close medical supervision required
- Data Source
- U.S. FDA via OpenFDA
What To Tell Your Doctor or Pharmacist
If you are taking Ribociclib and your doctor is considering prescribing Letrozole And Ribociclib (or vice versa), make sure to:
- Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
- Ask whether the benefits of combining these medications outweigh the risks for your specific situation
- Ask what symptoms to watch for that would indicate the interaction is causing problems
- Ask how frequently you should be monitored while these are co-prescribed
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider