Drug interactions
Influenza virus vaccine quadrivalent + Mercaptopurine
Severity: Minor
Influenza virus vaccine quadrivalent and Mercaptopurine: minor 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 may reduce antibody responses to inactivated influenza vaccine, so protection may be weaker. The inactivated vaccine carries no risk of vaccine-strain infection.
What this interaction means in plain words
Influenza virus vaccine quadrivalent and Mercaptopurine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Immunosuppression reduces the antibody response to vaccine antigens.
What to do
Give the annual inactivated vaccine as recommended. Avoid the live intranasal formulation in patients taking mercaptopurine.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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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 Influenza virus vaccine quadrivalent with Mercaptopurine?
MediHelp rates the interaction as minor. Influenza virus vaccine quadrivalent and Mercaptopurine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Mercaptopurine may reduce antibody responses to inactivated influenza vaccine, so protection may be weaker. The inactivated vaccine carries no risk of vaccine-strain infection.
How serious is the interaction between Influenza virus vaccine quadrivalent and Mercaptopurine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Give the annual inactivated vaccine as recommended. Avoid the live intranasal formulation in patients taking mercaptopurine.
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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