Drug interactions
Eliglustat + Posaconazole
Severity: Contraindicated
Eliglustat and Posaconazole: contraindicated 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
Posaconazole increases eliglustat concentrations, which may prolong PR, QRS and QT intervals and cause arrhythmias. The effect is greater in CYP2D6 poor or intermediate metabolizers and when a CYP2D6 inhibitor is also taken.
What this interaction means in plain words
Eliglustat and Posaconazole are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Eliglustat belongs to Miscellaneous; Posaconazole belongs to Anti Fungals.
Why it happens
Posaconazole inhibits CYP3A4, a secondary eliglustat clearance pathway that becomes critical when CYP2D6 activity is low or inhibited.
What to do
Avoid in CYP2D6 poor or intermediate metabolizers and with any additional CYP2D6 inhibitor. In extensive metabolizers, follow labeling with a reduced eliglustat dose and ECG monitoring, or choose an alternative antifungal.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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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 Eliglustat
- Amiodarone + Eliglustat Contraindicated
- Clarithromycin + Eliglustat Contraindicated
- Dronedarone + Eliglustat Contraindicated
- Eliglustat + Itraconazole Contraindicated
- Eliglustat + Ketoconazole Contraindicated
- Eliglustat + Pimozide Contraindicated
Frequently asked questions
Can I take Eliglustat with Posaconazole?
MediHelp rates the interaction as contraindicated. Eliglustat and Posaconazole are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Posaconazole increases eliglustat concentrations, which may prolong PR, QRS and QT intervals and cause arrhythmias. The effect is greater in CYP2D6 poor or intermediate metabolizers and when a CYP2D6 inhibitor is also taken.
How serious is the interaction between Eliglustat and Posaconazole?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid in CYP2D6 poor or intermediate metabolizers and with any additional CYP2D6 inhibitor. In extensive metabolizers, follow labeling with a reduced eliglustat dose and ECG monitoring, or choose an alternative antifungal.
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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