Drug interactions
Idelalisib + Pimozide
Severity: Contraindicated
Idelalisib and Pimozide: 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
Idelalisib is a strong CYP3A inhibitor and markedly raises pimozide concentrations. This may cause QT prolongation and life-threatening arrhythmia.
What this interaction means in plain words
Idelalisib and Pimozide 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.
Idelalisib belongs to Oncology; Pimozide belongs to Central Nervous System.
Why it happens
Strong CYP3A4 inhibition by idelalisib reduces pimozide metabolism.
What to do
Do not coadminister; use an alternative to pimozide while on idelalisib.
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 Pimozide
- Adagrasib + Pimozide Contraindicated
- Amiodarone + Pimozide Contraindicated
- Amisulpride + Pimozide Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amoxapine + Pimozide Contraindicated
- Anagrelide + Pimozide Contraindicated
Other interactions of Idelalisib
- Alfuzosin + Idelalisib Contraindicated
- Cisapride + Idelalisib Contraindicated
- Dihydroergotamine + Idelalisib Contraindicated
- Dronedarone + Idelalisib Contraindicated
- Eletriptan + Idelalisib Contraindicated
- Eplerenone + Idelalisib Contraindicated
Frequently asked questions
Can I take Idelalisib with Pimozide?
MediHelp rates the interaction as contraindicated. Idelalisib and Pimozide 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. Idelalisib is a strong CYP3A inhibitor and markedly raises pimozide concentrations. This may cause QT prolongation and life-threatening arrhythmia.
How serious is the interaction between Idelalisib and Pimozide?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not coadminister; use an alternative to pimozide while on idelalisib.
What other medicines interact with Pimozide?
MediHelp also lists interactions of Pimozide with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Pimozide page.
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