Drug interactions
Dexamethasone + Diphtheria and tetanus toxoids / acellular pertussis vaccine
Severity: Moderate
Dexamethasone and Diphtheria and tetanus toxoids / acellular pertussis vaccine: 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 vaccines such as DTaP. Protection may be weaker or less durable, but the vaccine remains safe to give.
What this interaction means in plain words
Dexamethasone and Diphtheria and tetanus toxoids / acellular pertussis vaccine 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
Do not delay indicated vaccination, but ideally vaccinate before immunosuppressive doses begin or after they are reduced. Consider revaccination if given during prolonged 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 / acellular pertussis vaccine?
MediHelp rates the interaction as moderate. Dexamethasone and Diphtheria and tetanus toxoids / acellular pertussis vaccine 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 vaccines such as DTaP. Protection may be weaker or less durable, but the vaccine remains safe to give.
How serious is the interaction between Dexamethasone and Diphtheria and tetanus toxoids / acellular pertussis vaccine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not delay indicated vaccination, but ideally vaccinate before immunosuppressive doses begin or after they are reduced. Consider revaccination if given during prolonged 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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