Drug interactions
Mitotane + Pimozide
Severity: Major
Mitotane and Pimozide: major 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
Mitotane is a strong CYP3A4 inducer that can substantially lower pimozide concentrations. This may cause loss of tic or psychotic symptom control, and the effect can persist for weeks after mitotane is stopped.
What this interaction means in plain words
Mitotane and Pimozide 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.
Mitotane belongs to Oncology; Pimozide belongs to Central Nervous System.
Why it happens
Induction of CYP3A4-mediated pimozide metabolism by mitotane.
What to do
Monitor clinical response and consider titrating pimozide upward, using ECG monitoring at higher doses. Reassess the dose when mitotane is stopped, as induction wanes slowly.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Mitotane and Pimozide, 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 Mitotane
- Doravirine + Mitotane Contraindicated
- Fostemsavir + Mitotane Contraindicated
- Lorlatinib + Mitotane Contraindicated
- Abiraterone + Mitotane Major
- Apixaban + Mitotane Major
- Aprepitant + Mitotane Major
Frequently asked questions
Can I take Mitotane with Pimozide?
MediHelp rates the interaction as major. Mitotane and Pimozide 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. Mitotane is a strong CYP3A4 inducer that can substantially lower pimozide concentrations. This may cause loss of tic or psychotic symptom control, and the effect can persist for weeks after mitotane is stopped.
How serious is the interaction between Mitotane and Pimozide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor clinical response and consider titrating pimozide upward, using ECG monitoring at higher doses. Reassess the dose when mitotane is stopped, as induction wanes slowly.
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.
