Drug interactions
Dexamethasone + Insulin inhaled
Severity: Moderate
Dexamethasone and Insulin inhaled: 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
Systemic dexamethasone raises blood glucose by promoting hepatic glucose output and peripheral insulin resistance. This opposes the effect of inhaled insulin and can lead to hyperglycemia and loss of glycemic control.
What this interaction means in plain words
Dexamethasone and Insulin inhaled 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
Pharmacodynamic antagonism: glucocorticoid-induced insulin resistance and increased gluconeogenesis.
What to do
Monitor blood glucose more frequently when starting, changing or stopping dexamethasone, and increase the insulin dose as needed. Reduce the insulin dose again when the steroid is tapered or 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 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 inhaled?
MediHelp rates the interaction as moderate. Dexamethasone and Insulin inhaled 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. Systemic dexamethasone raises blood glucose by promoting hepatic glucose output and peripheral insulin resistance. This opposes the effect of inhaled insulin and can lead to hyperglycemia and loss of glycemic control.
How serious is the interaction between Dexamethasone and Insulin inhaled?
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 when starting, changing or stopping dexamethasone, and increase the insulin dose as needed. Reduce the insulin dose again when the steroid is tapered or 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.
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