Fludrocortisone and Methotrexate interaction
Fludrocortisone and Methotrexate: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Fludrocortisone (Fludrocortisone Acetate) label · effective 2026-05-06
Chicken pox and measles, for example, can have a more serious or even fatal course in children on immunosuppressant corticosteroids.
Patients who are on immunosuppressant doses of corticosteroids should be warned to avoid exposure to chicken pox or measles and, if exposed, to obtain medical advice.
Children who are on immunosuppressant drugs are more susceptible to infections than healthy children.
From the Methotrexate (Xatmep) label · effective 2026-05-28
NSAIDs, Aspirin, and Steroids: May elevate and prolong serum methotrexate levels and increase gastrointestinal toxicity.
Nonsteroidal Anti-Inflammatory Drugs (NSAIDs), Aspirin, and Steroids Concomitant administration of some NSAIDs with high dose methotrexate therapy has been reported to elevate and prolong serum methotrexate levels, resulting in deaths from severe hematologic and gastrointestinal toxicity.
Aspirin, NSAIDs, and/or low dose steroids may be continued, although the possibility of increased toxicity with concomitant use of NSAIDs including salicylates has not been fully explored.
Steroids may be reduced gradually in patients who respond to methotrexate.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.