Drug interactions
Efgartigimod alfa + Rho human immunoglobulin
Severity: Moderate
Efgartigimod alfa and Rho human 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 accelerates IgG catabolism, which may lower levels of IgG-based products like Rho(D) immune globulin. Reduced levels could compromise prevention of Rh alloimmunization.
What this interaction means in plain words
Efgartigimod alfa and Rho human 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.
Why it happens
Efgartigimod blocks FcRn-mediated IgG recycling, increasing clearance of IgG-based Rho(D) immune globulin.
What to do
Where possible, time Rho(D) immune globulin administration away from efgartigimod dosing and monitor for adequate anti-D protection. Consider the clinical need for efgartigimod during pregnancy or after Rh-incompatible exposure.
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
Frequently asked questions
Can I take Efgartigimod alfa with Rho human immunoglobulin?
MediHelp rates the interaction as moderate. Efgartigimod alfa and Rho human 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 accelerates IgG catabolism, which may lower levels of IgG-based products like Rho(D) immune globulin. Reduced levels could compromise prevention of Rh alloimmunization.
How serious is the interaction between Efgartigimod alfa and Rho human 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: Where possible, time Rho(D) immune globulin administration away from efgartigimod dosing and monitor for adequate anti-D protection. Consider the clinical need for efgartigimod during pregnancy or after Rh-incompatible exposure.
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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