Drug interactions
Mercaptopurine + Ublituximab
Severity: Major
Mercaptopurine 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
Ublituximab depletes B cells, and mercaptopurine adds myelosuppressive and immunosuppressive effects. Together they can increase the risk of serious infections.
What this interaction means in plain words
Mercaptopurine 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.
Mercaptopurine belongs to Oncology; Ublituximab belongs to Miscellaneous.
Why it happens
Additive immunosuppression from anti-CD20 B-cell depletion and purine antimetabolite lymphocyte and marrow suppression.
What to do
Avoid combining where possible, or monitor closely for infection and check blood counts regularly. Consider the duration of effect of each drug when planning sequential therapy.
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 Mercaptopurine
- Adenovirus types 4 and 7 live + Mercaptopurine Contraindicated
- Azathioprine + Mercaptopurine Contraindicated
- Bcg vaccine live + Mercaptopurine Contraindicated
- Febuxostat + Mercaptopurine Contraindicated
- Influenza virus vaccine quadrivalent intranasal + Mercaptopurine Contraindicated
- Mercaptopurine + Smallpox vaccine live Contraindicated
Other interactions of Ublituximab
Frequently asked questions
Can I take Mercaptopurine with Ublituximab?
MediHelp rates the interaction as major. Mercaptopurine 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. Ublituximab depletes B cells, and mercaptopurine adds myelosuppressive and immunosuppressive effects. Together they can increase the risk of serious infections.
How serious is the interaction between Mercaptopurine 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 combining where possible, or monitor closely for infection and check blood counts regularly. Consider the duration of effect of each drug when planning sequential therapy.
What other medicines interact with Mercaptopurine?
MediHelp also lists interactions of Mercaptopurine with, for example, Adenovirus types 4 and 7 live, Azathioprine, Bcg vaccine live. The full list is on the Mercaptopurine page.
Full monographs, dosing and an interaction checker in the MediHelp app
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