Drug interactions
Dexamethasone + Insulin degludec / insulin aspart
Severity: Moderate
Dexamethasone and Insulin degludec / insulin aspart: 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 increases insulin resistance and hepatic glucose output, causing hyperglycemia that can offset insulin. Insulin requirements often rise, particularly postprandially, and may fall again when the steroid is reduced.
What this interaction means in plain words
Dexamethasone and Insulin degludec / insulin aspart 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
Glucocorticoid-induced insulin resistance and increased gluconeogenesis oppose insulin effect.
What to do
Monitor blood glucose more frequently and increase insulin, especially mealtime insulin, as needed. Reduce insulin as the steroid is tapered to avoid hypoglycemia.
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 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 Insulin degludec / insulin aspart?
MediHelp rates the interaction as moderate. Dexamethasone and Insulin degludec / insulin aspart 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 increases insulin resistance and hepatic glucose output, causing hyperglycemia that can offset insulin. Insulin requirements often rise, particularly postprandially, and may fall again when the steroid is reduced.
How serious is the interaction between Dexamethasone and Insulin degludec / insulin aspart?
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 more frequently and increase insulin, especially mealtime insulin, as needed. Reduce insulin as the steroid is tapered to avoid hypoglycemia.
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.
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