Drug interactions
Etrasimod + Methotrexate
Severity: Major
Etrasimod and Methotrexate: 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 methotrexate is immunosuppressive and myelosuppressive. Used together they may add to immunosuppression and the risk of serious infection. The combination has not been formally studied.
What this interaction means in plain words
Etrasimod and Methotrexate 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; Methotrexate belongs to Oncology.
Why it happens
Additive pharmacodynamic immunosuppression: sphingosine-1-phosphate receptor modulation lowers lymphocyte counts and methotrexate suppresses immune and bone marrow function.
What to do
Avoid the combination where possible. If it is used, monitor the complete blood count including lymphocytes and watch closely 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 Methotrexate
- Acitretin + Methotrexate Contraindicated
- Adenovirus types 4 and 7 live + Methotrexate Contraindicated
- Influenza virus vaccine quadrivalent intranasal + Methotrexate Contraindicated
- Ketorolac + Methotrexate Contraindicated
- Measles mumps and rubella vaccine live + Methotrexate Contraindicated
- Measles mumps and rubella vaccine + Methotrexate Contraindicated
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 Methotrexate?
MediHelp rates the interaction as major. Etrasimod and Methotrexate 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 methotrexate is immunosuppressive and myelosuppressive. Used together they may add to immunosuppression and the risk of serious infection. The combination has not been formally studied.
How serious is the interaction between Etrasimod and Methotrexate?
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 the combination where possible. If it is used, monitor the complete blood count including lymphocytes and watch closely for infection.
What other medicines interact with Methotrexate?
MediHelp also lists interactions of Methotrexate with, for example, Acitretin, Adenovirus types 4 and 7 live, Influenza virus vaccine quadrivalent intranasal. The full list is on the Methotrexate page.
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