Drug interactions
Ocrelizumab + Rabies vaccine chick embryo cell derived
Severity: Moderate
Ocrelizumab and Rabies vaccine chick embryo cell derived: 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
Ocrelizumab depletes B cells, which can blunt the antibody response to vaccines. The chick embryo cell derived rabies vaccine is inactivated rather than live, so it carries no risk of vaccine-related infection, but protective titers may be inadequate. This matters most when it is used for post-exposure prophylaxis.
What this interaction means in plain words
Ocrelizumab and Rabies vaccine chick embryo cell derived 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
B-cell depletion by ocrelizumab reduces humoral immune responses to vaccine antigens.
What to do
Where possible, give the rabies vaccine at least 2 weeks before starting ocrelizumab. If exposure occurs during treatment, vaccinate without delay and check rabies neutralizing antibody titers afterward.
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 Ocrelizumab
- Adenovirus types 4 and 7 live + Ocrelizumab Contraindicated
- Influenza virus vaccine quadrivalent intranasal + Ocrelizumab Contraindicated
- Measles mumps and rubella vaccine live + Ocrelizumab Contraindicated
- Measles mumps rubella and varicella vaccine live + Ocrelizumab Contraindicated
- Measles vaccine + Ocrelizumab Contraindicated
- Anti-thymocyte + Ocrelizumab Major
Frequently asked questions
Can I take Ocrelizumab with Rabies vaccine chick embryo cell derived?
MediHelp rates the interaction as moderate. Ocrelizumab and Rabies vaccine chick embryo cell derived 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. Ocrelizumab depletes B cells, which can blunt the antibody response to vaccines. The chick embryo cell derived rabies vaccine is inactivated rather than live, so it carries no risk of vaccine-related infection, but protective titers may be inadequate. This matters most when it is used for post-exposure prophylaxis.
How serious is the interaction between Ocrelizumab and Rabies vaccine chick embryo cell derived?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Where possible, give the rabies vaccine at least 2 weeks before starting ocrelizumab. If exposure occurs during treatment, vaccinate without delay and check rabies neutralizing antibody titers afterward.
What other medicines interact with Ocrelizumab?
MediHelp also lists interactions of Ocrelizumab with, for example, Adenovirus types 4 and 7 live, Influenza virus vaccine quadrivalent intranasal, Measles mumps and rubella vaccine live. The full list is on the Ocrelizumab page.
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