Drug interactions
Doxorubicin liposomal + Trastuzumab
Severity: Major
Doxorubicin liposomal and Trastuzumab: 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
Trastuzumab can cause left ventricular dysfunction and heart failure, and the risk is greatest when it is given with or soon after anthracyclines. Liposomal doxorubicin is less cardiotoxic than conventional doxorubicin but still adds cardiac risk.
What this interaction means in plain words
Doxorubicin liposomal and Trastuzumab 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 cardiotoxicity: anthracycline myocyte injury combined with impaired HER2-dependent cardiomyocyte repair from trastuzumab.
What to do
Avoid the combination if possible. If it is used, assess left ventricular ejection fraction before and at regular intervals during treatment, and stop trastuzumab for significant decline.
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 Trastuzumab
Frequently asked questions
Can I take Doxorubicin liposomal with Trastuzumab?
MediHelp rates the interaction as major. Doxorubicin liposomal and Trastuzumab 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. Trastuzumab can cause left ventricular dysfunction and heart failure, and the risk is greatest when it is given with or soon after anthracyclines. Liposomal doxorubicin is less cardiotoxic than conventional doxorubicin but still adds cardiac risk.
How serious is the interaction between Doxorubicin liposomal and Trastuzumab?
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 if possible. If it is used, assess left ventricular ejection fraction before and at regular intervals during treatment, and stop trastuzumab for significant decline.
What other medicines interact with Trastuzumab?
MediHelp also lists interactions of Trastuzumab with, for example, Daunorubicin, Doxorubicin, Epirubicin. The full list is on the Trastuzumab page.
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