Drug interactions
Pimozide + Trofinetide
Severity: Moderate
Pimozide and Trofinetide: 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
Trofinetide is a weak CYP3A4 inhibitor and may raise pimozide concentrations modestly. Because pimozide has a narrow margin and causes dose-related QT prolongation, even small increases can matter.
What this interaction means in plain words
Pimozide and Trofinetide 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.
Pimozide belongs to Central Nervous System; Trofinetide belongs to Central Nervous System.
Why it happens
Weak inhibition of CYP3A4 reduces pimozide metabolism.
What to do
Monitor for pimozide toxicity and consider an ECG after starting trofinetide. Reduce the pimozide dose if QTc lengthens or adverse effects appear.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Pimozide and Trofinetide, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
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 Trofinetide
Frequently asked questions
Can I take Pimozide with Trofinetide?
MediHelp rates the interaction as moderate. Pimozide and Trofinetide 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. Trofinetide is a weak CYP3A4 inhibitor and may raise pimozide concentrations modestly. Because pimozide has a narrow margin and causes dose-related QT prolongation, even small increases can matter.
How serious is the interaction between Pimozide and Trofinetide?
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 for pimozide toxicity and consider an ECG after starting trofinetide. Reduce the pimozide dose if QTc lengthens or adverse effects appear.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
