Drug interactions
Leflunomide + Muromonab cd3
Severity: Major
Leflunomide and Muromonab cd3: 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
Muromonab-CD3 causes profound T-cell depletion, and leflunomide adds further immunosuppression and potential myelosuppression. Risk of serious infection is increased.
What this interaction means in plain words
Leflunomide and Muromonab cd3 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 from T-cell depletion and inhibition of lymphocyte proliferation.
What to do
Avoid the combination where possible. If used, monitor closely for infection and check blood counts.
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 Leflunomide
- Bcg vaccine live + Leflunomide Contraindicated
- Influenza virus vaccine quadrivalent intranasal + Leflunomide Contraindicated
- Leflunomide + Measles mumps and rubella vaccine live Contraindicated
- Leflunomide + Measles mumps rubella and varicella vaccine live Contraindicated
- Leflunomide + Measles vaccine Contraindicated
- Leflunomide + Smallpox vaccine live Contraindicated
Frequently asked questions
Can I take Leflunomide with Muromonab cd3?
MediHelp rates the interaction as major. Leflunomide and Muromonab cd3 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. Muromonab-CD3 causes profound T-cell depletion, and leflunomide adds further immunosuppression and potential myelosuppression. Risk of serious infection is increased.
How serious is the interaction between Leflunomide and Muromonab cd3?
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 the combination where possible. If used, monitor closely for infection and check blood counts.
What other medicines interact with Leflunomide?
MediHelp also lists interactions of Leflunomide with, for example, Bcg vaccine live, Influenza virus vaccine quadrivalent intranasal, Measles mumps and rubella vaccine live. The full list is on the Leflunomide page.
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