Drug interactions
Butabarbital + Fludrocortisone
Severity: Moderate
Butabarbital and Fludrocortisone: 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
Barbiturates induce hepatic CYP3A4 and may speed up fludrocortisone metabolism, lowering its effect. Patients with adrenal insufficiency could lose adequate mineralocorticoid replacement.
What this interaction means in plain words
Butabarbital and Fludrocortisone 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
Induction of CYP3A4 by butabarbital increases fludrocortisone clearance.
What to do
Monitor blood pressure, serum sodium and potassium, and symptoms of adrenal insufficiency. Increase the fludrocortisone dose if needed, and reduce it again if the barbiturate is stopped.
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 Fludrocortisone
Frequently asked questions
Can I take Butabarbital with Fludrocortisone?
MediHelp rates the interaction as moderate. Butabarbital and Fludrocortisone 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. Barbiturates induce hepatic CYP3A4 and may speed up fludrocortisone metabolism, lowering its effect. Patients with adrenal insufficiency could lose adequate mineralocorticoid replacement.
How serious is the interaction between Butabarbital and Fludrocortisone?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure, serum sodium and potassium, and symptoms of adrenal insufficiency. Increase the fludrocortisone dose if needed, and reduce it again if the barbiturate is stopped.
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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