Drug Interactions between Kisqali Femara Co-Pack and tovorafenib
This report displays the potential drug interactions for the following 2 drugs:
- Kisqali Femara Co-Pack (letrozole/ribociclib)
- tovorafenib
Interactions between your drugs
letrozole ribociclib
Applies to: Kisqali Femara Co-Pack (letrozole / ribociclib) and Kisqali Femara Co-Pack (letrozole / ribociclib)
Ribociclib may increase the blood levels and effects of letrozole. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Contact your doctor if your condition changes or you experience increased side effects. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
ribociclib tovorafenib
Applies to: Kisqali Femara Co-Pack (letrozole / ribociclib) and tovorafenib
Consumer information for this interaction is not currently available.
MONITOR: Coadministration with inducers of CYP450 3A4 may decrease the plasma concentrations of ribociclib, which is a substrate of the isoenzyme. Physiologically-based pharmacokinetic simulations (PBPK) suggest that a moderate CYP450 3A4 inducer, efavirenz, may decrease ribociclib Cmax and AUC by 37% and 60%, respectively. However, data with less potent CYP450 3A4 inducers are limited.
MANAGEMENT: The potential for diminished therapeutic effects of ribociclib should be considered when prescribed with inducers of CYP450 3A4, particularly moderate inducers including efavirenz and nevirapine. Pharmacologic effects of ribociclib should be monitored more closely whenever an inducer is added to or withdrawn from therapy. Alternative treatment may be required if an interaction is suspected.
References
- Cerner Multum, Inc. "UK Summary of Product Characteristics."
- Cerner Multum, Inc. "Australian Product Information."
- (2017) "Product Information. Kisqali (ribociclib)." Novartis Pharmaceuticals
Drug and food interactions
ribociclib food
Applies to: Kisqali Femara Co-Pack (letrozole / ribociclib)
Patients should not consume pomegranates, pomegranate juice, grapefruit, or grapefruit juice during treatment with ribociclib unless directed otherwise by your doctor. Pomegranate juice or grapefruit juice can increase the blood levels of ribociclib. You may be more likely to experience side effects such as nausea; vomiting; diarrhea; loss of appetite; abdominal pain; mouth sores; hair loss; weakness; and impaired bone marrow function resulting in low numbers of different types of blood cells, which can increase the risk of anemia, bleeding problems, and infections. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Therapeutic duplication warnings
No warnings were found for your selected drugs.
Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.
See also
Drug Interaction Classification
| Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
| Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
| Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. | |
| No interaction information available. |
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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