Drug interactions
Dexamethasone + Prednisone
Severity: Moderate
Dexamethasone and Prednisone: moderate 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
Both are systemic glucocorticoids, so using them together duplicates therapy and increases cumulative steroid exposure. This raises risks of hyperglycemia, infection, adrenal suppression, mood effects, and bone loss without clear added benefit.
What this interaction means in plain words
Dexamethasone and Prednisone 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.
Dexamethasone belongs to Endocrine; Prednisone belongs to Endocrine.
Why it happens
Additive glucocorticoid receptor effects; dexamethasone may also modestly induce CYP3A4.
What to do
Avoid concurrent use of two systemic corticosteroids unless intended, such as a specific protocol. Monitor glucose, blood pressure, and infection signs and use the lowest total dose.
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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References
- Prednisone - FDA drug label (DailyMed) — openFDA / DailyMed
Other interactions of Prednisone
- Bcg vaccine live + Prednisone Contraindicated
- Measles vaccine + Prednisone Contraindicated
- Mifepristone + Prednisone Contraindicated
- Prednisone + Radium-223 dichloride Contraindicated
- Prednisone + Smallpox vaccine live Contraindicated
- Adenovirus types 4 and 7 live + Prednisone Major
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 Prednisone?
MediHelp rates the interaction as moderate. Dexamethasone and Prednisone 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. Both are systemic glucocorticoids, so using them together duplicates therapy and increases cumulative steroid exposure. This raises risks of hyperglycemia, infection, adrenal suppression, mood effects, and bone loss without clear added benefit.
How serious is the interaction between Dexamethasone and Prednisone?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concurrent use of two systemic corticosteroids unless intended, such as a specific protocol. Monitor glucose, blood pressure, and infection signs and use the lowest total dose.
What other medicines interact with Prednisone?
MediHelp also lists interactions of Prednisone with, for example, Bcg vaccine live, Measles vaccine, Mifepristone. The full list is on the Prednisone page.
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