Drug interactions
Doxorubicin + Efavirenz
Severity: Minor
Doxorubicin and Efavirenz: minor 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
Efavirenz may lower doxorubicin exposure through enzyme induction, which could reduce efficacy. Evidence is limited, as CYP3A4 is only a minor route of doxorubicin elimination.
What this interaction means in plain words
Doxorubicin and Efavirenz have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Doxorubicin belongs to Oncology; Efavirenz belongs to Anti Virals.
Why it happens
Efavirenz induces CYP3A4, which has a minor role in doxorubicin metabolism.
What to do
No routine dose change; monitor oncologic response and toxicity during combined therapy.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Doxorubicin and Efavirenz, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Efavirenz
- Cobimetinib + Efavirenz Contraindicated
- Dienogest / estradiol valerate + Efavirenz Contraindicated
- Dihydroergotamine intranasal + Efavirenz Contraindicated
- Dihydroergotamine + Efavirenz Contraindicated
- Doravirine + Efavirenz Contraindicated
- Efavirenz + Elbasvir / grazoprevir Contraindicated
Other interactions of Doxorubicin
Frequently asked questions
Can I take Doxorubicin with Efavirenz?
MediHelp rates the interaction as minor. Doxorubicin and Efavirenz have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Efavirenz may lower doxorubicin exposure through enzyme induction, which could reduce efficacy. Evidence is limited, as CYP3A4 is only a minor route of doxorubicin elimination.
How serious is the interaction between Doxorubicin and Efavirenz?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine dose change; monitor oncologic response and toxicity during combined therapy.
What other medicines interact with Efavirenz?
MediHelp also lists interactions of Efavirenz with, for example, Cobimetinib, Dienogest / estradiol valerate, Dihydroergotamine intranasal. The full list is on the Efavirenz page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
