Drug interactions
Posaconazole + Tisotumab vedotin
Severity: Moderate
Posaconazole and Tisotumab vedotin: moderate 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
The cytotoxic payload of tisotumab vedotin, MMAE, is metabolized by CYP3A4, so a strong inhibitor like posaconazole may increase unconjugated MMAE exposure. This could heighten toxicities such as neutropenia, neuropathy and ocular events.
What this interaction means in plain words
Posaconazole and Tisotumab vedotin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Posaconazole belongs to Anti Fungals; Tisotumab vedotin belongs to Oncology.
Why it happens
Strong CYP3A4 inhibition by posaconazole reduces the clearance of released MMAE.
What to do
Monitor closely for signs of MMAE toxicity, including blood counts and neuropathy, during concomitant use. Consider an alternative antifungal where feasible.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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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 Tisotumab vedotin
- Chloramphenicol + Tisotumab vedotin Moderate
- Clarithromycin + Tisotumab vedotin Moderate
- Itraconazole + Tisotumab vedotin Moderate
- Ketoconazole + Tisotumab vedotin Moderate
- Mifepristone + Tisotumab vedotin Moderate
- Tisotumab vedotin + Voriconazole Moderate
Frequently asked questions
Can I take Posaconazole with Tisotumab vedotin?
MediHelp rates the interaction as moderate. Posaconazole and Tisotumab vedotin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. The cytotoxic payload of tisotumab vedotin, MMAE, is metabolized by CYP3A4, so a strong inhibitor like posaconazole may increase unconjugated MMAE exposure. This could heighten toxicities such as neutropenia, neuropathy and ocular events.
How serious is the interaction between Posaconazole and Tisotumab vedotin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor closely for signs of MMAE toxicity, including blood counts and neuropathy, during concomitant use. Consider an alternative antifungal where feasible.
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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