Drug interactions
Chlorambucil + Obinutuzumab
Severity: Moderate
Chlorambucil and Obinutuzumab: moderate 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
Obinutuzumab can cause neutropenia and thrombocytopenia, and chlorambucil is myelosuppressive, so the combination may increase cytopenias, infections and bleeding. This pairing is used deliberately in CLL, but hematologic toxicity needs active management.
What this interaction means in plain words
Chlorambucil and Obinutuzumab can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Chlorambucil belongs to Oncology; Obinutuzumab belongs to Oncology.
Why it happens
Additive myelosuppression and immune suppression from two agents with overlapping hematologic toxicity.
What to do
Monitor complete blood counts regularly, particularly platelets and neutrophils, throughout treatment. Delay or reduce doses and give transfusion or growth-factor support if severe cytopenias occur.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Chlorambucil
Other interactions of Obinutuzumab
Frequently asked questions
Can I take Chlorambucil with Obinutuzumab?
MediHelp rates the interaction as moderate. Chlorambucil and Obinutuzumab can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Obinutuzumab can cause neutropenia and thrombocytopenia, and chlorambucil is myelosuppressive, so the combination may increase cytopenias, infections and bleeding. This pairing is used deliberately in CLL, but hematologic toxicity needs active management.
How serious is the interaction between Chlorambucil and Obinutuzumab?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor complete blood counts regularly, particularly platelets and neutrophils, throughout treatment. Delay or reduce doses and give transfusion or growth-factor support if severe cytopenias occur.
What other medicines interact with Chlorambucil?
MediHelp also lists interactions of Chlorambucil with, for example, Adenovirus types 4 and 7 live, Axicabtagene ciloleucel, Belatacept. The full list is on the Chlorambucil page.
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