Drug interactions
Itraconazole + Lurbinectedin
Severity: Major
Itraconazole and Lurbinectedin: major interaction.
Last updated Sources: EMA SmPC
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
Itraconazole raises lurbinectedin exposure through CYP3A4 inhibition, increasing the risk of myelosuppression and hepatotoxicity.
What this interaction means in plain words
Itraconazole and Lurbinectedin 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.
Itraconazole belongs to Anti Fungals; Lurbinectedin belongs to Oncology.
Why it happens
Strong CYP3A4 inhibition reduces lurbinectedin clearance.
What to do
Avoid if possible; otherwise reduce the lurbinectedin dose by 50% and monitor blood counts and liver enzymes. Restore the prior dose after the inhibitor has been stopped for about 5 half-lives.
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 Itraconazole
- Alfuzosin + Itraconazole Contraindicated
- Alprazolam + Itraconazole Contraindicated
- Avanafil + Itraconazole Contraindicated
- Conivaptan + Itraconazole Contraindicated
- Dihydroergotamine intranasal + Itraconazole Contraindicated
- Dihydroergotamine + Itraconazole Contraindicated
Other interactions of Lurbinectedin
Frequently asked questions
Can I take Itraconazole with Lurbinectedin?
MediHelp rates the interaction as major. Itraconazole and Lurbinectedin 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. Itraconazole raises lurbinectedin exposure through CYP3A4 inhibition, increasing the risk of myelosuppression and hepatotoxicity.
How serious is the interaction between Itraconazole and Lurbinectedin?
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 if possible; otherwise reduce the lurbinectedin dose by 50% and monitor blood counts and liver enzymes. Restore the prior dose after the inhibitor has been stopped for about 5 half-lives.
What other medicines interact with Itraconazole?
MediHelp also lists interactions of Itraconazole with, for example, Alfuzosin, Alprazolam, Avanafil. The full list is on the Itraconazole page.
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