Drug interactions
Haemophilus influenzae type b vaccine + Sirolimus
Severity: Moderate
Haemophilus influenzae type b vaccine and Sirolimus: 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 with sirolimus may blunt the antibody response to Hib vaccine, leaving patients less protected. The vaccine is non-live so there is no infection risk from the vaccine itself.
What this interaction means in plain words
Haemophilus influenzae type b vaccine and Sirolimus 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
Sirolimus inhibits mTOR-dependent lymphocyte proliferation, reducing the vaccine immune response.
What to do
Vaccinate ideally before starting sirolimus or when immunosuppression is lowest. Consider checking antibody response or revaccinating if given during 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 Sirolimus
- Adenovirus types 4 and 7 live + Sirolimus Contraindicated
- Bcg vaccine live + Sirolimus Contraindicated
- Influenza virus vaccine quadrivalent intranasal + Sirolimus Contraindicated
- Ketoconazole + Sirolimus Contraindicated
- Levoketoconazole + Sirolimus Contraindicated
- Measles mumps and rubella vaccine live + Sirolimus Contraindicated
Frequently asked questions
Can I take Haemophilus influenzae type b vaccine with Sirolimus?
MediHelp rates the interaction as moderate. Haemophilus influenzae type b vaccine and Sirolimus 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 with sirolimus may blunt the antibody response to Hib vaccine, leaving patients less protected. The vaccine is non-live so there is no infection risk from the vaccine itself.
How serious is the interaction between Haemophilus influenzae type b vaccine and Sirolimus?
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 ideally before starting sirolimus or when immunosuppression is lowest. Consider checking antibody response or revaccinating if given during therapy.
What other medicines interact with Sirolimus?
MediHelp also lists interactions of Sirolimus with, for example, Adenovirus types 4 and 7 live, Bcg vaccine live, Influenza virus vaccine quadrivalent intranasal. The full list is on the Sirolimus page.
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