Drug interactions
Efgartigimod alfa + Immunoglobulin
Severity: Moderate
Efgartigimod alfa and Immunoglobulin: 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
Efgartigimod blocks the neonatal Fc receptor and lowers circulating IgG, which may reduce exposure to and efficacy of immunoglobulin products. Its own effect may also be altered.
What this interaction means in plain words
Efgartigimod alfa and Immunoglobulin 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.
Efgartigimod alfa belongs to Miscellaneous; Immunoglobulin belongs to Miscellaneous.
Why it happens
Competitive FcRn blockade increases lysosomal catabolism of IgG, including therapeutic immunoglobulin.
What to do
Monitor clinical response closely if both are used together. Consider stopping efgartigimod if prolonged immunoglobulin therapy is essential.
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 Efgartigimod alfa
- Adalimumab + Efgartigimod alfa Moderate
- Ado-trastuzumab + Efgartigimod alfa Moderate
- Basiliximab + Efgartigimod alfa Moderate
- Bevacizumab + Efgartigimod alfa Moderate
- Brentuximab + Efgartigimod alfa Moderate
- Denosumab + Efgartigimod alfa Moderate
Other interactions of Immunoglobulin
- Immunoglobulin + Pozelimab Major
- Dinutuximab beta + Immunoglobulin Moderate
- Immunoglobulin + Nipocalimab Moderate
- Immunoglobulin + Rozanolixizumab Moderate
Frequently asked questions
Can I take Efgartigimod alfa with Immunoglobulin?
MediHelp rates the interaction as moderate. Efgartigimod alfa and Immunoglobulin 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. Efgartigimod blocks the neonatal Fc receptor and lowers circulating IgG, which may reduce exposure to and efficacy of immunoglobulin products. Its own effect may also be altered.
How serious is the interaction between Efgartigimod alfa and Immunoglobulin?
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 clinical response closely if both are used together. Consider stopping efgartigimod if prolonged immunoglobulin therapy is essential.
What other medicines interact with Efgartigimod alfa?
MediHelp also lists interactions of Efgartigimod alfa with, for example, Adalimumab, Ado-trastuzumab, Basiliximab. The full list is on the Efgartigimod alfa page.
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