Drug interactions
Fludrocortisone + Smallpox vaccine live
Severity: Major
Fludrocortisone and Smallpox vaccine live: 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
Live vaccinia vaccine can cause serious progressive vaccinia in immunosuppressed individuals, and corticosteroids reduce both vaccine response and control of the virus. Low-dose fludrocortisone carries less immunosuppression than glucocorticoids, but the consequences of vaccinia spread are severe.
What this interaction means in plain words
Fludrocortisone and Smallpox vaccine live 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 impairs host control of replicating vaccinia virus and reduces vaccine response.
What to do
Assess total corticosteroid exposure and the vaccination indication before giving the vaccine. Defer vaccination if immunosuppressive doses are being used, unless exposure risk outweighs the hazard.
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 Smallpox vaccine live?
MediHelp rates the interaction as major. Fludrocortisone and Smallpox vaccine live 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. Live vaccinia vaccine can cause serious progressive vaccinia in immunosuppressed individuals, and corticosteroids reduce both vaccine response and control of the virus. Low-dose fludrocortisone carries less immunosuppression than glucocorticoids, but the consequences of vaccinia spread are severe.
How serious is the interaction between Fludrocortisone and Smallpox vaccine live?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Assess total corticosteroid exposure and the vaccination indication before giving the vaccine. Defer vaccination if immunosuppressive doses are being used, unless exposure risk outweighs the hazard.
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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