Drug interactions
Etrasimod + Topotecan
Severity: Major
Etrasimod and Topotecan: 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 topotecan is myelosuppressive, so combined use may increase the risk of infection. Combined effects have not been formally studied.
What this interaction means in plain words
Etrasimod and Topotecan 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; Topotecan belongs to Oncology.
Why it happens
Additive immunosuppression from S1P receptor modulation (lymphocyte sequestration) and cytotoxic bone marrow suppression.
What to do
Avoid starting etrasimod during chemotherapy and for some weeks afterward if possible. If combined, monitor blood counts and infection signs closely.
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 Topotecan
- Adenovirus types 4 and 7 live + Topotecan Contraindicated
- Amiodarone + Topotecan Major
- Cisplatin + Topotecan Major
- Cobicistat + Topotecan Major
- Cyclosporine + Topotecan Major
- Cyclosporin + Topotecan 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 Etrasimod with Topotecan?
MediHelp rates the interaction as major. Etrasimod and Topotecan 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 topotecan is myelosuppressive, so combined use may increase the risk of infection. Combined effects have not been formally studied.
How serious is the interaction between Etrasimod and Topotecan?
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 starting etrasimod during chemotherapy and for some weeks afterward if possible. If combined, monitor blood counts and infection signs closely.
What other medicines interact with Topotecan?
MediHelp also lists interactions of Topotecan with, for example, Adenovirus types 4 and 7 live, Amiodarone, Cisplatin. The full list is on the Topotecan page.
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