Drug interactions
Efgartigimod / hyaluronidase sc + Obinutuzumab
Severity: Moderate
Efgartigimod / hyaluronidase sc and Obinutuzumab: 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
Subcutaneous efgartigimod blocks FcRn, which normally protects IgG from degradation, and may lower exposure to obinutuzumab. This may reduce obinutuzumab effectiveness.
What this interaction means in plain words
Efgartigimod / hyaluronidase sc and Obinutuzumab 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
FcRn blockade accelerates clearance of IgG-based monoclonal antibodies.
What to do
Monitor for loss of obinutuzumab efficacy, such as B-cell depletion or disease response. If prolonged obinutuzumab therapy is essential, consider an alternative to efgartigimod.
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 Obinutuzumab
Frequently asked questions
Can I take Efgartigimod / hyaluronidase sc with Obinutuzumab?
MediHelp rates the interaction as moderate. Efgartigimod / hyaluronidase sc and Obinutuzumab 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. Subcutaneous efgartigimod blocks FcRn, which normally protects IgG from degradation, and may lower exposure to obinutuzumab. This may reduce obinutuzumab effectiveness.
How serious is the interaction between Efgartigimod / hyaluronidase sc and Obinutuzumab?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for loss of obinutuzumab efficacy, such as B-cell depletion or disease response. If prolonged obinutuzumab therapy is essential, consider an alternative to efgartigimod.
What other medicines interact with Obinutuzumab?
MediHelp also lists interactions of Obinutuzumab with, for example, Measles mumps and rubella vaccine, Adenovirus types 4 and 7 live, Axicabtagene ciloleucel. The full list is on the Obinutuzumab page.
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