Drug interactions
Dexamethasone + Diphtheria and tetanus toxoids
Severity: Moderate
Dexamethasone and Diphtheria and tetanus toxoids: 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 corticosteroids suppress immune responses and may reduce the antibody response to inactivated toxoid vaccines. Protection may therefore be weaker or less durable, but the vaccine is not unsafe to give.
What this interaction means in plain words
Dexamethasone and Diphtheria and tetanus toxoids 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-mediated suppression of lymphocyte function and antibody production blunts the vaccine immune response.
What to do
Vaccinate when needed, even during steroid therapy, but where possible give it before starting immunosuppressive doses or after dose reduction. Consider checking antibody titres or repeating the dose if given during high-dose therapy.
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 Diphtheria and tetanus toxoids?
MediHelp rates the interaction as moderate. Dexamethasone and Diphtheria and tetanus toxoids 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 corticosteroids suppress immune responses and may reduce the antibody response to inactivated toxoid vaccines. Protection may therefore be weaker or less durable, but the vaccine is not unsafe to give.
How serious is the interaction between Dexamethasone and Diphtheria and tetanus toxoids?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Vaccinate when needed, even during steroid therapy, but where possible give it before starting immunosuppressive doses or after dose reduction. Consider checking antibody titres or repeating the dose if given during high-dose therapy.
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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