Drug interactions
Chlorambucil + Trastuzumab
Severity: Moderate
Chlorambucil and Trastuzumab: 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
Trastuzumab given with myelosuppressive chemotherapy has been associated with higher rates of neutropenia and febrile neutropenia. Chlorambucil can add to this bone marrow suppression, increasing infection risk.
What this interaction means in plain words
Chlorambucil and Trastuzumab 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; Trastuzumab belongs to Oncology.
Why it happens
Additive hematologic toxicity; trastuzumab increases neutropenia when added to myelosuppressive chemotherapy.
What to do
Monitor neutrophil counts regularly and assess promptly for fever or infection. Reduce the chlorambucil dose or delay treatment if severe neutropenia develops.
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 Trastuzumab
Frequently asked questions
Can I take Chlorambucil with Trastuzumab?
MediHelp rates the interaction as moderate. Chlorambucil and Trastuzumab 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. Trastuzumab given with myelosuppressive chemotherapy has been associated with higher rates of neutropenia and febrile neutropenia. Chlorambucil can add to this bone marrow suppression, increasing infection risk.
How serious is the interaction between Chlorambucil and Trastuzumab?
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 neutrophil counts regularly and assess promptly for fever or infection. Reduce the chlorambucil dose or delay treatment if severe neutropenia develops.
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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