Drug interactions
Dexamethasone + Influenza a vaccine
Severity: Moderate
Dexamethasone and Influenza a vaccine: 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
Systemic corticosteroids at greater than physiologic doses can blunt the immune response to the H5N1 vaccine. Protection may be reduced.
What this interaction means in plain words
Dexamethasone and Influenza a vaccine 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
Glucocorticoid immunosuppression suppresses lymphocyte activation and antibody production.
What to do
Where feasible, vaccinate before starting immunosuppressive steroid doses, and consider reassessing the immune response or revaccination after therapy.
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 Dexamethasone
- Bcg vaccine live + Dexamethasone Contraindicated
- Dexamethasone + Mifepristone Contraindicated
- Dexamethasone + Rilpivirine Contraindicated
- Dexamethasone + Smallpox vaccine live Contraindicated
- Dexamethasone + Varicella virus vaccine live Contraindicated
- Dexamethasone + Yellow fever vaccine Contraindicated
Frequently asked questions
Can I take Dexamethasone with Influenza a vaccine?
MediHelp rates the interaction as moderate. Dexamethasone and Influenza a vaccine 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. Systemic corticosteroids at greater than physiologic doses can blunt the immune response to the H5N1 vaccine. Protection may be reduced.
How serious is the interaction between Dexamethasone and Influenza a vaccine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Where feasible, vaccinate before starting immunosuppressive steroid doses, and consider reassessing the immune response or revaccination after therapy.
What other medicines interact with Dexamethasone?
MediHelp also lists interactions of Dexamethasone with, for example, Bcg vaccine live, Mifepristone, Rilpivirine. The full list is on the Dexamethasone page.
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