Doxorubicin and Trastuzumab: Drug Interaction Guide

Quick answer: This is a major interaction — avoid combining Doxorubicin and Trastuzumab unless specifically directed by your doctor.

Interaction severity: Major — avoid combination

How Doxorubicin interacts with Trastuzumab

Both doxorubicin and trastuzumab can impair cardiac function through different cardiotoxic mechanisms. Sequential or concurrent exposure increases risk of left ventricular dysfunction and heart failure.

What you should do

Avoid concurrent administration when possible and follow oncology protocols for sequencing. Monitor left ventricular ejection fraction before and during treatment.

Key facts

Severity

Major — avoid combination

Mechanism

Both doxorubicin and trastuzumab can impair cardiac function through different cardiotoxic mechanisms. Sequential or con...

Action

Avoid concurrent administration when possible and follow oncology protocols for sequencing. Monitor left ventricular eje...

Important medical disclaimer: This page provides educational information about drug interactions for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your specific medications with a qualified healthcare provider before starting, stopping, or changing any treatment. About our editorial team.

Frequently asked questions

Can I take Doxorubicin and Trastuzumab together?

No — this combination should generally be avoided. Avoid concurrent administration when possible and follow oncology protocols for sequencing. Monitor left ventricular ejection fraction before and during treatment.

What is the severity of this interaction?

The interaction between Doxorubicin and Trastuzumab is classified as Major — avoid combination. Both doxorubicin and trastuzumab can impair cardiac function through different cardiotoxic mechanisms. Sequential or concurrent exposure increases risk of left ventricular dysfunction and heart failure.

What should I do if I'm prescribed both?

Avoid concurrent administration when possible and follow oncology protocols for sequencing. Monitor left ventricular ejection fraction before and during treatment. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: by iMedic Medical Editorial Team. Our editorial process.