Drug interactions
Fludarabine + Influenza virus vaccine quadrivalent adjuvanted
Severity: Moderate
Fludarabine and Influenza virus vaccine quadrivalent adjuvanted: moderate 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
Fludarabine causes profound lymphopenia and impaired B- and T-cell function, so the antibody response to an inactivated influenza vaccine is likely to be reduced. The vaccine is not unsafe, but protection may be inadequate.
What this interaction means in plain words
Fludarabine and Influenza virus vaccine quadrivalent adjuvanted can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Fludarabine-induced lymphocyte depletion reduces the immune response to vaccination.
What to do
Vaccination remains advisable but ideally should be given before starting fludarabine or after immune recovery. Do not rely on the vaccine alone; consider close contact vaccination and early antiviral treatment.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Fludarabine
- Adenovirus types 4 and 7 live + Fludarabine Contraindicated
- Fludarabine + Pentostatin Contraindicated
- Belatacept + Fludarabine Major
- Dengue vaccine + Fludarabine Major
- Etrasimod + Fludarabine Major
- Fingolimod + Fludarabine Major
Frequently asked questions
Can I take Fludarabine with Influenza virus vaccine quadrivalent adjuvanted?
MediHelp rates the interaction as moderate. Fludarabine and Influenza virus vaccine quadrivalent adjuvanted can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Fludarabine causes profound lymphopenia and impaired B- and T-cell function, so the antibody response to an inactivated influenza vaccine is likely to be reduced. The vaccine is not unsafe, but protection may be inadequate.
How serious is the interaction between Fludarabine and Influenza virus vaccine quadrivalent adjuvanted?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Vaccination remains advisable but ideally should be given before starting fludarabine or after immune recovery. Do not rely on the vaccine alone; consider close contact vaccination and early antiviral treatment.
What other medicines interact with Fludarabine?
MediHelp also lists interactions of Fludarabine with, for example, Adenovirus types 4 and 7 live, Pentostatin, Belatacept. The full list is on the Fludarabine page.
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