Drug interactions
Natalizumab + Ublituximab
Severity: Major
Natalizumab and Ublituximab: 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
Natalizumab limits immune cell entry into tissues including the CNS, and ublituximab depletes B cells. Together they may increase the risk of serious infections, including progressive multifocal leukoencephalopathy.
What this interaction means in plain words
Natalizumab and Ublituximab 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.
Natalizumab belongs to Gastrointestinal Tract; Ublituximab belongs to Miscellaneous.
Why it happens
Additive immunosuppression through blocked leukocyte trafficking plus CD20 B-cell depletion.
What to do
Avoid concurrent use. When switching, plan the washout using the effect duration of the first agent, and monitor for infection and new neurological symptoms.
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 Natalizumab
- Natalizumab + Vedolizumab Contraindicated
- Axicabtagene ciloleucel + Natalizumab Major
- Baricitinib + Natalizumab Major
- Belatacept + Natalizumab Major
- Brexucabtagene autoleucel + Natalizumab Major
- Cabazitaxel + Natalizumab Major
Other interactions of Ublituximab
Frequently asked questions
Can I take Natalizumab with Ublituximab?
MediHelp rates the interaction as major. Natalizumab and Ublituximab 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. Natalizumab limits immune cell entry into tissues including the CNS, and ublituximab depletes B cells. Together they may increase the risk of serious infections, including progressive multifocal leukoencephalopathy.
How serious is the interaction between Natalizumab and Ublituximab?
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. When switching, plan the washout using the effect duration of the first agent, and monitor for infection and new neurological symptoms.
What other medicines interact with Natalizumab?
MediHelp also lists interactions of Natalizumab with, for example, Vedolizumab, Axicabtagene ciloleucel, Baricitinib. The full list is on the Natalizumab page.
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