Drug interactions
Dengue vaccine + Fludarabine
Severity: Major
Dengue vaccine and Fludarabine: 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
Dengue vaccine (Dengvaxia) is a live attenuated vaccine. Fludarabine-induced immunosuppression may blunt the immune response to it, and in a severely immunocompromised patient the live virus could cause vaccine-related disease.
What this interaction means in plain words
Dengue vaccine and Fludarabine 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.
Why it happens
Fludarabine-induced lymphocyte depletion reduces the immune response to the vaccine and may allow uncontrolled replication of the live vaccine virus.
What to do
Do not give live dengue vaccine during fludarabine therapy or while the patient remains significantly immunosuppressed afterward; vaccinate once immune recovery is confirmed.
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 Fludarabine
- Adenovirus types 4 and 7 live + Fludarabine Contraindicated
- Fludarabine + Pentostatin Contraindicated
- Belatacept + Fludarabine Major
- Etrasimod + Fludarabine Major
- Fingolimod + Fludarabine Major
- Fludarabine + Ofatumumab sc Major
Frequently asked questions
Can I take Dengue vaccine with Fludarabine?
MediHelp rates the interaction as major. Dengue vaccine and Fludarabine 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. Dengue vaccine (Dengvaxia) is a live attenuated vaccine. Fludarabine-induced immunosuppression may blunt the immune response to it, and in a severely immunocompromised patient the live virus could cause vaccine-related disease.
How serious is the interaction between Dengue vaccine and Fludarabine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not give live dengue vaccine during fludarabine therapy or while the patient remains significantly immunosuppressed afterward; vaccinate once immune recovery is confirmed.
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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