Drug interactions
Cladribine + Ofatumumab sc
Severity: Major
Cladribine and Ofatumumab sc: major interaction.
Last updated Sources: US FDA label
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
Both drugs deplete lymphocytes, one by direct cytotoxicity and the other through B-cell depletion. Combined or sequential overlapping use increases the risk of prolonged immunosuppression and infection.
What this interaction means in plain words
Cladribine 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 immunosuppression via T- and B-lymphocyte depletion.
What to do
Avoid concurrent use and allow lymphocyte recovery when switching between them. Monitor lymphocyte counts and infection signs.
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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References
Other interactions of Cladribine
- Adenovirus types 4 and 7 live + Cladribine Contraindicated
- Cladribine + Siponimod Contraindicated
- Cladribine + Tofacitinib Contraindicated
- Axicabtagene ciloleucel + Cladribine Major
- Belatacept + Cladribine Major
- Brexucabtagene autoleucel + Cladribine Major
Frequently asked questions
Can I take Cladribine with Ofatumumab sc?
MediHelp rates the interaction as major. Cladribine 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. Both drugs deplete lymphocytes, one by direct cytotoxicity and the other through B-cell depletion. Combined or sequential overlapping use increases the risk of prolonged immunosuppression and infection.
How serious is the interaction between Cladribine 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 and allow lymphocyte recovery when switching between them. Monitor lymphocyte counts and infection signs.
What other medicines interact with Cladribine?
MediHelp also lists interactions of Cladribine with, for example, Adenovirus types 4 and 7 live, Siponimod, Tofacitinib. The full list is on the Cladribine page.
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