Drug interactions
Tucatinib + Upadacitinib
Severity: Major
Tucatinib and Upadacitinib: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Tucatinib is a strong CYP3A inhibitor and may increase upadacitinib exposure. This raises the risk of dose-related adverse effects such as infection and cytopenias.
What this interaction means in plain words
Tucatinib and Upadacitinib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Tucatinib belongs to Oncology; Upadacitinib belongs to Musculoskeletal.
Why it happens
Tucatinib inhibits CYP3A4, reducing upadacitinib clearance.
What to do
Avoid if possible, or use the lowest labeled upadacitinib dose for the indication. Monitor for infections and hematologic abnormalities.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Upadacitinib
- Abrocitinib + Upadacitinib Contraindicated
- Adenovirus types 4 and 7 live + Upadacitinib Contraindicated
- Baricitinib + Upadacitinib Contraindicated
- Bcg vaccine live + Upadacitinib Contraindicated
- Cyclosporine + Upadacitinib Contraindicated
- Dengue vaccine + Upadacitinib Contraindicated
Other interactions of Tucatinib
- Cisapride + Tucatinib Contraindicated
- Eletriptan + Tucatinib Contraindicated
- Ergotamine + Tucatinib Contraindicated
- Flibanserin + Tucatinib Contraindicated
- Ranolazine + Tucatinib Contraindicated
- Amobarbital + Tucatinib Major
Frequently asked questions
Can I take Tucatinib with Upadacitinib?
MediHelp rates the interaction as major. Tucatinib and Upadacitinib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Tucatinib is a strong CYP3A inhibitor and may increase upadacitinib exposure. This raises the risk of dose-related adverse effects such as infection and cytopenias.
How serious is the interaction between Tucatinib and Upadacitinib?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid if possible, or use the lowest labeled upadacitinib dose for the indication. Monitor for infections and hematologic abnormalities.
What other medicines interact with Upadacitinib?
MediHelp also lists interactions of Upadacitinib with, for example, Abrocitinib, Adenovirus types 4 and 7 live, Baricitinib. The full list is on the Upadacitinib page.
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