Drug interactions
Etrasimod + Pemetrexed
Severity: Major
Etrasimod and Pemetrexed: 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 pemetrexed causes myelosuppression, so the two together may increase susceptibility to infection. The combination has not been formally studied.
What this interaction means in plain words
Etrasimod and Pemetrexed 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 belongs to Gastrointestinal Tract; Pemetrexed belongs to Oncology.
Why it happens
Additive immunosuppression from lymphocyte sequestration by etrasimod and bone marrow suppression by pemetrexed.
What to do
Avoid combining where possible, and allow for the lingering effect of etrasimod after it is stopped. If used together, monitor blood counts and watch for infection.
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 Pemetrexed
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 Etrasimod with Pemetrexed?
MediHelp rates the interaction as major. Etrasimod and Pemetrexed 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 pemetrexed causes myelosuppression, so the two together may increase susceptibility to infection. The combination has not been formally studied.
How serious is the interaction between Etrasimod and Pemetrexed?
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 possible, and allow for the lingering effect of etrasimod after it is stopped. If used together, monitor blood counts and watch for infection.
What other medicines interact with Pemetrexed?
MediHelp also lists interactions of Pemetrexed with, for example, Bacitracin, Brexucabtagene autoleucel, Celecoxib. The full list is on the Pemetrexed page.
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