Drug interactions
Etrasimod + Fulvestrant
Severity: Minor
Etrasimod and Fulvestrant: minor 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 can increase infection risk. Fulvestrant is an endocrine agent with little immunosuppressive effect, so a meaningful additive immune interaction is not established.
What this interaction means in plain words
Etrasimod and Fulvestrant have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Etrasimod belongs to Gastrointestinal Tract; Fulvestrant belongs to Endocrine.
Why it happens
No established mechanism; fulvestrant is not meaningfully immunosuppressive.
What to do
No change is routinely needed. Monitor for infection and check lymphocyte counts as per etrasimod labeling.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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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 Fulvestrant?
MediHelp rates the interaction as minor. Etrasimod and Fulvestrant have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Etrasimod lowers circulating lymphocytes and can increase infection risk. Fulvestrant is an endocrine agent with little immunosuppressive effect, so a meaningful additive immune interaction is not established.
How serious is the interaction between Etrasimod and Fulvestrant?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No change is routinely needed. Monitor for infection and check lymphocyte counts as per etrasimod labeling.
What other medicines interact with Etrasimod?
MediHelp also lists interactions of Etrasimod with, for example, Abatacept, Amiodarone, Anagrelide. The full list is on the Etrasimod page.
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