Drug interactions
Bendamustine + Lomustine
Severity: Major
Bendamustine and Lomustine: 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
Both are alkylating agents; lomustine in particular causes delayed and prolonged myelosuppression. Combined use increases the risk of severe cytopenias.
What this interaction means in plain words
Bendamustine and Lomustine 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.
Bendamustine belongs to Oncology; Lomustine belongs to Oncology.
Why it happens
Additive myelosuppression from DNA alkylation, with lomustine's delayed nadir.
What to do
Monitor blood counts weekly for several weeks after dosing and reduce doses or delay cycles for severe 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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Other interactions of Bendamustine
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 Bendamustine with Lomustine?
MediHelp rates the interaction as major. Bendamustine and Lomustine 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 are alkylating agents; lomustine in particular causes delayed and prolonged myelosuppression. Combined use increases the risk of severe cytopenias.
How serious is the interaction between Bendamustine and Lomustine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood counts weekly for several weeks after dosing and reduce doses or delay cycles for severe cytopenias.
What other medicines interact with Bendamustine?
MediHelp also lists interactions of Bendamustine with, for example, Axicabtagene ciloleucel, Brexucabtagene autoleucel, Chlorambucil. The full list is on the Bendamustine page.
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