Drug interactions
Fludarabine + Ofatumumab sc
Severity: Major
Fludarabine and Ofatumumab sc: major 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
Ofatumumab depletes B cells and fludarabine causes broad lymphocyte depletion. Together they increase the immunosuppressive burden and the risk of serious infection, including opportunistic infection and hepatitis B reactivation.
What this interaction means in plain words
Fludarabine and Ofatumumab sc can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Additive pharmacodynamic immunosuppression from anti-CD20 B-cell depletion and purine analogue cytotoxicity.
What to do
Avoid concurrent use where possible; monitor for infection and lymphocyte and immunoglobulin levels, and screen for hepatitis B before treatment.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Fludarabine
- Adenovirus types 4 and 7 live + Fludarabine Contraindicated
- Fludarabine + Pentostatin Contraindicated
- Belatacept + Fludarabine Major
- Dengue vaccine + Fludarabine Major
- Etrasimod + Fludarabine Major
- Fingolimod + Fludarabine Major
Frequently asked questions
Can I take Fludarabine with Ofatumumab sc?
MediHelp rates the interaction as major. Fludarabine and Ofatumumab sc can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Ofatumumab depletes B cells and fludarabine causes broad lymphocyte depletion. Together they increase the immunosuppressive burden and the risk of serious infection, including opportunistic infection and hepatitis B reactivation.
How serious is the interaction between Fludarabine and Ofatumumab sc?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concurrent use where possible; monitor for infection and lymphocyte and immunoglobulin levels, and screen for hepatitis B before treatment.
What other medicines interact with Fludarabine?
MediHelp also lists interactions of Fludarabine with, for example, Adenovirus types 4 and 7 live, Pentostatin, Belatacept. The full list is on the Fludarabine page.
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