Drug interactions
Colchicine + Efavirenz
Severity: Minor
Colchicine 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 induces CYP3A4 and may lower colchicine concentrations, potentially reducing efficacy for gout flares or prophylaxis. The effect is variable and unlikely to cause toxicity.
What this interaction means in plain words
Colchicine 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.
Colchicine belongs to Genitourinary; Efavirenz belongs to Anti Virals.
Why it happens
Efavirenz induces CYP3A4 (and possibly P-glycoprotein), increasing colchicine clearance.
What to do
Monitor for loss of colchicine efficacy and titrate the dose to clinical response.
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?
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Other interactions of Colchicine
- Clarithromycin + Colchicine Contraindicated
- Cobicistat + Colchicine Contraindicated
- Colchicine + Cyclosporine Contraindicated
- Colchicine + Ensitrelvir Contraindicated
- Colchicine + Levoketoconazole Contraindicated
- Colchicine + Nirmatrelvir Contraindicated
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
Frequently asked questions
Can I take Colchicine with Efavirenz?
MediHelp rates the interaction as minor. Colchicine 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 induces CYP3A4 and may lower colchicine concentrations, potentially reducing efficacy for gout flares or prophylaxis. The effect is variable and unlikely to cause toxicity.
How serious is the interaction between Colchicine 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: Monitor for loss of colchicine efficacy and titrate the dose to clinical response.
What other medicines interact with Colchicine?
MediHelp also lists interactions of Colchicine with, for example, Clarithromycin, Cobicistat, Cyclosporine. The full list is on the Colchicine page.
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