Drug interactions
Fingolimod + Natalizumab
Severity: Major
Fingolimod and Natalizumab: 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
Combining natalizumab with fingolimod increases the risk of serious infection through additive immunosuppression. Natalizumab is also associated with progressive multifocal leukoencephalopathy, and concurrent immunomodulators may add to that concern.
What this interaction means in plain words
Fingolimod and Natalizumab 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.
Fingolimod belongs to Central Nervous System; Natalizumab belongs to Gastrointestinal Tract.
Why it happens
Additive immunosuppression: natalizumab blocks alpha-4 integrin-mediated leukocyte trafficking while fingolimod sequesters lymphocytes in lymph nodes.
What to do
Avoid concurrent use. When switching, monitor for infection and PML symptoms, and allow for the lingering immune effects of the first drug.
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 Natalizumab
- Natalizumab + Vedolizumab Contraindicated
- Axicabtagene ciloleucel + Natalizumab Major
- Baricitinib + Natalizumab Major
- Belatacept + Natalizumab Major
- Brexucabtagene autoleucel + Natalizumab Major
- Cabazitaxel + Natalizumab Major
Other interactions of Fingolimod
- Adenovirus types 4 and 7 live + Fingolimod Contraindicated
- Bcg vaccine live + Fingolimod Contraindicated
- Fingolimod + Pimozide Contraindicated
- Fingolimod + Ponesimod Contraindicated
- Fingolimod + Quinidine Contraindicated
- Fingolimod + Siponimod Contraindicated
Frequently asked questions
Can I take Fingolimod with Natalizumab?
MediHelp rates the interaction as major. Fingolimod and Natalizumab 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. Combining natalizumab with fingolimod increases the risk of serious infection through additive immunosuppression. Natalizumab is also associated with progressive multifocal leukoencephalopathy, and concurrent immunomodulators may add to that concern.
How serious is the interaction between Fingolimod and Natalizumab?
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 concurrent use. When switching, monitor for infection and PML symptoms, and allow for the lingering immune effects of the first drug.
What other medicines interact with Natalizumab?
MediHelp also lists interactions of Natalizumab with, for example, Vedolizumab, Axicabtagene ciloleucel, Baricitinib. The full list is on the Natalizumab page.
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