Drug interactions
Mercaptopurine + Pneumococcal vaccine polyvalent
Severity: Moderate
Mercaptopurine and Pneumococcal vaccine polyvalent: 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
Mercaptopurine can blunt the antibody response to pneumococcal vaccination, leaving patients less protected. Inactivated polysaccharide or conjugate vaccines are safe to give but may be less effective.
What this interaction means in plain words
Mercaptopurine and Pneumococcal vaccine polyvalent 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 impairs lymphocyte proliferation and antibody production after vaccination.
What to do
Give the vaccine as recommended, ideally before starting immunosuppression when feasible. Do not skip it, and consider checking serologic response or revaccination per guidelines.
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 Mercaptopurine with Pneumococcal vaccine polyvalent?
MediHelp rates the interaction as moderate. Mercaptopurine and Pneumococcal vaccine polyvalent 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. Mercaptopurine can blunt the antibody response to pneumococcal vaccination, leaving patients less protected. Inactivated polysaccharide or conjugate vaccines are safe to give but may be less effective.
How serious is the interaction between Mercaptopurine and Pneumococcal vaccine polyvalent?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Give the vaccine as recommended, ideally before starting immunosuppression when feasible. Do not skip it, and consider checking serologic response or revaccination per guidelines.
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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