Tucatinib with Cyclosporine Interaction Details
Brand Names Associated with Tucatinib
- Tucatinib
- Tukysa®
Brand Names Associated with Cyclosporine
- Cyclosporine
- Gengraf®
- Neoral®
- Sandimmune® Capsules
- Sandimmune® Oral Solution
Medical Content Editor Dr. Brian Staiger, PharmD
Last updated
Dec 20, 2023
Interaction Effect
Increased exposure to CYP3A substrate and risk of toxicity
Interaction Summary
Avoid concomitant use of tucatinib with a CYP3A substrate where minimal concentration changes may lead to serious or life-threatening toxicities. In a clinical study, concomitant use of tucatinib with midazolam (CYP3A substrate) significantly increased midazolam AUC and Cmax. If coadministration is required, reduce the CYP3A substrate dosage.
Severity
Major
Onset
Unspecified
Evidence
Theoretical
How To Manage Interaction
Avoid concomitant use of tucatinib with a CYP3A substrate where minimal concentration changes may lead to serious or life-threatening toxicities. If coadministration is required, reduce the CYP3A substrate dosage.
Mechanism Of Interaction
Inhibition of CYP3A substrate metabolism by tucatinib
Literature Reports
A) In a clinical study, coadministration of a single midazolam 2 mg dose with steady-state tucatinib 300 mg twice daily resulted in a ratio of midazolam exposure with and without tucatinib for AUC of 5.7 and Cmax of 3 .
Tucatinib Overview
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Tucatinib is used with trastuzumab (Herceptin) and capecitabine (Xeloda) to treat a certain type of hormone receptor–positive breast cancer that has spread to other parts of the body and cannot be treated with surgery in adults who have already been treated with at least one other chemotherapy medication. Tucatinib is also used with trastuzumab to treat a certain type of colorectal cancer (cancer that begins in the large intestine) that has spread to other parts of the body and cannot be treated with surgery in adults who have already been treated with other chemotherapy medications and have not improved or worsened. Tucatinib is in a class of medications called kinase inhibitors. It works by blocking the action of the abnormal protein that signals cancer cells to multiply. This helps stop or slow the spread of cancer cells.
Cyclosporine Overview
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Cyclosporine and cyclosporine (modified) are used with other medications to prevent transplant rejection (attack of the transplanted organ by the immune system of the person who received the organ) in people who have received kidney, liver, and heart transplants. Cyclosporine (modified) is also used alone or with methotrexate (Rheumatrex) to treat the symptoms of rheumatoid arthritis (arthritis caused by swelling of the lining of the joints) in patients whose symptoms were not relieved by methotrexate alone. Cyclosporine (modified) is also used to treat psoriasis (a skin disease in which red, scaly patches form on some areas of the body) in certain patients who have not been helped by other treatments. Cyclosporine and cyclosporine (modified) are in a class of medications called immunosuppressants. They work by decreasing the activity of the immune system.
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Definitions
Severity Categories
Contraindicated
These drugs, generally, should not be used together simultaneously due to the high risk of severe adverse effects. Combining these medications can lead to dangerous health outcomes and should be strictly avoided unless otherwise instructed by your provider.
Major
This interaction could result in very serious and potentially life-threatening consequences. If you are taking this drug combination, it is very important to be under close medical supervision to minimize severe side effects and ensure your safety. It may be necessary to change a medication or dosage to prevent harm.
Moderate
This interaction has the potential to worsen your medical condition or alter the effectiveness of your treatment. It's important that you are monitored closely and you potentially may need to make adjustments in your treatment plan or drug dosage to maintain optimal health.
Minor
While this interaction is unlikely to cause significant problems, it could intensify side effects or reduce the effectiveness of one or both medications. Monitoring for changes in symptoms and your condition is recommended, and adjustments may be made if needed to manage any increased or more pronounced side effects.
Onset
Rapid: Onset of drug interaction typically occurs within 24 hours of co-administration.
Delayed: Onset of drug interaction typically occurs more than 24 hours after co-administration.
Evidence
Level of documentation of the interaction.
Established: The interaction is documented and substantiated in peer-reviewed medical literature.
Theoretical: This interaction is not fully supported by current medical evidence or well-documented sources, but it is based on known drug mechanisms, drug effects, and other relevant information.
How To Manage The Interaction
Provides a detailed discussion on how patients and clinicians can approach the identified drug interaction as well as offers guidance on what to expect and strategies to potentially mitigate the effects of the interaction. This may include recommendations on adjusting medication dosages, altering the timing of drug administration, or closely monitoring for specific symptoms.
It's important to note that all medical situations are unique, and management approaches should be tailored to individual circumstances. Patients should always consult their healthcare provider for personalized advice and guidance on managing drug interactions effectively.
Mechanism Of Interaction
The theorized or clinically determined reason (i.e., mechanism) why the drug-drug interaction occurs.
Disclaimer: The information provided on this page is for informational purposes only and should not be considered medical advice. Always consult with a qualified healthcare professional regarding your specific circumstances and medical conditions.
Where Does Our Information Come From?
Information for our drug interactions is compiled from several drug compendia, including:
The prescribing information for each drug, as published on DailyMED, is also used.
Individual drug-drug interaction detail pages contain references specific to that interaction. You can click on the reference number within brackets '[]' to see what reference was utilized.
The information posted is fact-checked by HelloPharmacist clinicians and reviewed quarterly.