Drug interactions
Lomustine + Ropeginterferon alfa 2b
Severity: Major
Lomustine and Ropeginterferon alfa 2b: 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 suppress the bone marrow, so combining them may cause excessive neutropenia, thrombocytopenia and anemia. This increases the risk of infection and bleeding.
What this interaction means in plain words
Lomustine and Ropeginterferon alfa 2b 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 myelosuppression.
What to do
Avoid the combination where possible. If used together, monitor CBC frequently and reduce doses or hold therapy for significant cytopenias.
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 Lomustine
- Adenovirus types 4 and 7 live + Lomustine Contraindicated
- Bcg vaccine live + Lomustine Contraindicated
- Influenza virus vaccine quadrivalent intranasal + Lomustine Contraindicated
- Lomustine + Measles mumps and rubella vaccine Contraindicated
- Lomustine + Measles mumps and rubella vaccine live Contraindicated
- Lomustine + Measles mumps rubella and varicella vaccine live Contraindicated
Frequently asked questions
Can I take Lomustine with Ropeginterferon alfa 2b?
MediHelp rates the interaction as major. Lomustine and Ropeginterferon alfa 2b 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 suppress the bone marrow, so combining them may cause excessive neutropenia, thrombocytopenia and anemia. This increases the risk of infection and bleeding.
How serious is the interaction between Lomustine and Ropeginterferon alfa 2b?
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 together, monitor CBC frequently and reduce doses or hold therapy for significant cytopenias.
What other medicines interact with Lomustine?
MediHelp also lists interactions of Lomustine with, for example, Adenovirus types 4 and 7 live, Bcg vaccine live, Influenza virus vaccine quadrivalent intranasal. The full list is on the Lomustine page.
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