Drug interactions
Dexamethasone + Metformin
Severity: Moderate
Dexamethasone and Metformin: 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
Dexamethasone raises blood glucose and can reduce the effectiveness of metformin. Glycemic control may worsen during steroid courses, and additional therapy is sometimes needed.
What this interaction means in plain words
Dexamethasone and Metformin 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; Metformin belongs to Endocrine.
Why it happens
Glucocorticoids increase hepatic gluconeogenesis and insulin resistance, opposing the glucose-lowering action of metformin.
What to do
Monitor blood glucose during dexamethasone therapy and intensify antidiabetic treatment if needed. Reassess the regimen when the steroid 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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Dexamethasone and Metformin, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
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
Other interactions of Metformin
Frequently asked questions
Can I take Dexamethasone with Metformin?
MediHelp rates the interaction as moderate. Dexamethasone and Metformin 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 raises blood glucose and can reduce the effectiveness of metformin. Glycemic control may worsen during steroid courses, and additional therapy is sometimes needed.
How serious is the interaction between Dexamethasone and Metformin?
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 glucose during dexamethasone therapy and intensify antidiabetic treatment if needed. Reassess the regimen when the steroid is stopped.
What other medicines interact with Dexamethasone?
MediHelp also lists interactions of Dexamethasone with, for example, Bcg vaccine live, Mifepristone, Rilpivirine. The full list is on the Dexamethasone page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
