Drug interactions
Erlotinib + Etrasimod
Severity: Major
Erlotinib and Etrasimod: 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
Etrasimod lowers circulating lymphocytes, and erlotinib is an antineoplastic agent. Combined use may add to immune suppression and infection risk. The combination has not been studied.
What this interaction means in plain words
Erlotinib and Etrasimod 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.
Erlotinib belongs to Oncology; Etrasimod belongs to Gastrointestinal Tract.
Why it happens
Additive pharmacodynamic immunosuppression through S1P receptor-mediated lymphocyte sequestration plus antineoplastic effects.
What to do
Avoid combining where an alternative exists. If unavoidable, monitor closely for infection and check blood counts, including lymphocytes.
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 Erlotinib
- Amobarbital + Erlotinib Major
- Apalutamide + Erlotinib Major
- Carbamazepine + Erlotinib Major
- Cobicistat + Erlotinib Major
- Darunavir + Erlotinib Major
- Dexlansoprazole + Erlotinib Major
Other interactions of Etrasimod
- Abatacept + Etrasimod Major
- Amiodarone + Etrasimod Major
- Anagrelide + Etrasimod Major
- Anakinra + Etrasimod Major
- Anti-thymocyte + Etrasimod Major
- Asenapine + Etrasimod Major
Frequently asked questions
Can I take Erlotinib with Etrasimod?
MediHelp rates the interaction as major. Erlotinib and Etrasimod 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. Etrasimod lowers circulating lymphocytes, and erlotinib is an antineoplastic agent. Combined use may add to immune suppression and infection risk. The combination has not been studied.
How serious is the interaction between Erlotinib and Etrasimod?
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 combining where an alternative exists. If unavoidable, monitor closely for infection and check blood counts, including lymphocytes.
What other medicines interact with Erlotinib?
MediHelp also lists interactions of Erlotinib with, for example, Amobarbital, Apalutamide, Carbamazepine. The full list is on the Erlotinib page.
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