Drug interactions
Fludrocortisone + Yellow fever vaccine
Severity: Major
Fludrocortisone and Yellow fever vaccine: major interaction.
Last updated Sources: US FDA label
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
Yellow fever vaccine is live attenuated and may cause serious vaccine-associated disease in immunosuppressed people, while corticosteroids also blunt the immune response. Replacement-dose fludrocortisone carries less risk, though adrenal-insufficient patients often take glucocorticoids as well.
What this interaction means in plain words
Fludrocortisone and Yellow fever vaccine 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
Corticosteroid immunosuppression reduces vaccine response and may allow excessive replication of the live attenuated virus.
What to do
Check total corticosteroid dose before vaccinating. If immunosuppressive doses are used, defer vaccination or issue a medical exemption letter where travel risk allows.
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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References
Other interactions of Fludrocortisone
Frequently asked questions
Can I take Fludrocortisone with Yellow fever vaccine?
MediHelp rates the interaction as major. Fludrocortisone and Yellow fever vaccine 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. Yellow fever vaccine is live attenuated and may cause serious vaccine-associated disease in immunosuppressed people, while corticosteroids also blunt the immune response. Replacement-dose fludrocortisone carries less risk, though adrenal-insufficient patients often take glucocorticoids as well.
How serious is the interaction between Fludrocortisone and Yellow fever vaccine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check total corticosteroid dose before vaccinating. If immunosuppressive doses are used, defer vaccination or issue a medical exemption letter where travel risk allows.
What other medicines interact with Fludrocortisone?
MediHelp also lists interactions of Fludrocortisone with, for example, Mifepristone, Aldesleukin, Amphotericin b. The full list is on the Fludrocortisone page.
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