Drug interactions
Lapatinib + Selexipag
Severity: Moderate
Lapatinib and Selexipag: moderate 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
Lapatinib may inhibit CYP2C8 and BCRP, raising exposure to selexipag and its active metabolite. This may increase headache, flushing, nausea, diarrhea and hypotension.
What this interaction means in plain words
Lapatinib and Selexipag can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Lapatinib belongs to Oncology; Selexipag belongs to Cardiovascular.
Why it happens
Inhibition of CYP2C8 metabolism and BCRP transport by lapatinib.
What to do
Monitor for prostacyclin-related adverse effects and blood pressure, and reduce selexipag frequency if poorly tolerated.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Lapatinib and Selexipag, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Lapatinib
- Dofetilide + Lapatinib Contraindicated
- Ibutilide + Lapatinib Contraindicated
- Lapatinib + Pimozide Contraindicated
- Lapatinib + Saquinavir Contraindicated
- Lapatinib + Thioridazine Contraindicated
- Adagrasib + Lapatinib Major
Other interactions of Selexipag
- Gemfibrozil + Selexipag Contraindicated
- Abiraterone + Selexipag Moderate
- Apalutamide + Selexipag Moderate
- Carbamazepine + Selexipag Moderate
- Clopidogrel + Selexipag Moderate
- Cyclosporin + Selexipag Moderate
Frequently asked questions
Can I take Lapatinib with Selexipag?
MediHelp rates the interaction as moderate. Lapatinib and Selexipag can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Lapatinib may inhibit CYP2C8 and BCRP, raising exposure to selexipag and its active metabolite. This may increase headache, flushing, nausea, diarrhea and hypotension.
How serious is the interaction between Lapatinib and Selexipag?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for prostacyclin-related adverse effects and blood pressure, and reduce selexipag frequency if poorly tolerated.
What other medicines interact with Lapatinib?
MediHelp also lists interactions of Lapatinib with, for example, Dofetilide, Ibutilide, Pimozide. The full list is on the Lapatinib page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
