Drug interactions
Anthrax vaccine + Mercaptopurine
Severity: Moderate
Anthrax vaccine and Mercaptopurine: 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
Immunosuppression from mercaptopurine can reduce the antibody response to anthrax vaccine, leaving patients less protected. The vaccine (non-live) is safe to give, but its effectiveness may be diminished.
What this interaction means in plain words
Anthrax vaccine and Mercaptopurine 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
Immunosuppression by mercaptopurine reduces vaccine immunogenicity.
What to do
Vaccinate before starting immunosuppressive therapy when feasible. Otherwise vaccinate and consider checking antibody response, with revaccination if needed.
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 Mercaptopurine
- Adenovirus types 4 and 7 live + Mercaptopurine Contraindicated
- Azathioprine + Mercaptopurine Contraindicated
- Bcg vaccine live + Mercaptopurine Contraindicated
- Febuxostat + Mercaptopurine Contraindicated
- Influenza virus vaccine quadrivalent intranasal + Mercaptopurine Contraindicated
- Mercaptopurine + Smallpox vaccine live Contraindicated
Frequently asked questions
Can I take Anthrax vaccine with Mercaptopurine?
MediHelp rates the interaction as moderate. Anthrax vaccine and Mercaptopurine 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. Immunosuppression from mercaptopurine can reduce the antibody response to anthrax vaccine, leaving patients less protected. The vaccine (non-live) is safe to give, but its effectiveness may be diminished.
How serious is the interaction between Anthrax vaccine and Mercaptopurine?
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 before starting immunosuppressive therapy when feasible. Otherwise vaccinate and consider checking antibody response, with revaccination if needed.
What other medicines interact with Mercaptopurine?
MediHelp also lists interactions of Mercaptopurine with, for example, Adenovirus types 4 and 7 live, Azathioprine, Bcg vaccine live. The full list is on the Mercaptopurine page.
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