Drug interactions
Darolutamide + Efavirenz
Severity: Major
Darolutamide and Efavirenz: 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
Efavirenz may decrease darolutamide exposure because darolutamide is cleared by CYP3A4 and P-gp, which could reduce control of prostate cancer.
What this interaction means in plain words
Darolutamide and Efavirenz 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.
Darolutamide belongs to Miscellaneous; Efavirenz belongs to Anti Virals.
Why it happens
Efavirenz induces CYP3A4 and P-gp, lowering darolutamide concentrations.
What to do
Avoid combined P-gp and CYP3A4 inducers where possible. If it cannot be avoided, monitor PSA and clinical response.
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 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 Darolutamide
Frequently asked questions
Can I take Darolutamide with Efavirenz?
MediHelp rates the interaction as major. Darolutamide and Efavirenz 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. Efavirenz may decrease darolutamide exposure because darolutamide is cleared by CYP3A4 and P-gp, which could reduce control of prostate cancer.
How serious is the interaction between Darolutamide and Efavirenz?
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 combined P-gp and CYP3A4 inducers where possible. If it cannot be avoided, monitor PSA and clinical response.
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.
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