Drug interactions
Duvelisib + Posaconazole
Severity: Major
Duvelisib and Posaconazole: major interaction.
Last updated Sources: US FDA label
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
Posaconazole increases duvelisib exposure, which may heighten toxicities such as infections, diarrhea or colitis, cutaneous reactions and pneumonitis.
What this interaction means in plain words
Duvelisib and Posaconazole 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.
Duvelisib belongs to Oncology; Posaconazole belongs to Anti Fungals.
Why it happens
Strong CYP3A4 inhibition reduces duvelisib clearance, increasing its AUC.
What to do
Reduce duvelisib to 15 mg twice daily during posaconazole therapy, and monitor for toxicity. Return to the prior dose after posaconazole is stopped and its effect has washed out.
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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References
Other interactions of Posaconazole
- Artemether + Posaconazole Contraindicated
- Avanafil + Posaconazole Contraindicated
- Cobimetinib + Posaconazole Contraindicated
- Conivaptan + Posaconazole Contraindicated
- Dihydroergotamine intranasal + Posaconazole Contraindicated
- Dihydroergotamine + Posaconazole Contraindicated
Other interactions of Duvelisib
- Duvelisib + Ergotamine Contraindicated
- Alfuzosin + Duvelisib Major
- Apalutamide + Duvelisib Major
- Avanafil + Duvelisib Major
- Carbamazepine + Duvelisib Major
- Chloramphenicol + Duvelisib Major
Frequently asked questions
Can I take Duvelisib with Posaconazole?
MediHelp rates the interaction as major. Duvelisib and Posaconazole 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. Posaconazole increases duvelisib exposure, which may heighten toxicities such as infections, diarrhea or colitis, cutaneous reactions and pneumonitis.
How serious is the interaction between Duvelisib and Posaconazole?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Reduce duvelisib to 15 mg twice daily during posaconazole therapy, and monitor for toxicity. Return to the prior dose after posaconazole is stopped and its effect has washed out.
What other medicines interact with Posaconazole?
MediHelp also lists interactions of Posaconazole with, for example, Artemether, Avanafil, Cobimetinib. The full list is on the Posaconazole page.
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