Drug interactions
Pimozide + Schisandra
Severity: Moderate
Pimozide and Schisandra: 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
Schisandra constituents may inhibit CYP3A4, potentially raising pimozide levels. Because pimozide has a narrow margin for QT prolongation, higher exposure is a safety concern, although clinical data are limited.
What this interaction means in plain words
Pimozide and Schisandra 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.
Why it happens
Possible inhibition of CYP3A4-mediated pimozide metabolism by schisandra lignans.
What to do
Avoid concomitant herbal use where possible; if used, monitor for QT-related symptoms and consider an ECG.
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 Pimozide
- Adagrasib + Pimozide Contraindicated
- Amiodarone + Pimozide Contraindicated
- Amisulpride + Pimozide Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amoxapine + Pimozide Contraindicated
- Anagrelide + Pimozide Contraindicated
Frequently asked questions
Can I take Pimozide with Schisandra?
MediHelp rates the interaction as moderate. Pimozide and Schisandra 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. Schisandra constituents may inhibit CYP3A4, potentially raising pimozide levels. Because pimozide has a narrow margin for QT prolongation, higher exposure is a safety concern, although clinical data are limited.
How serious is the interaction between Pimozide and Schisandra?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concomitant herbal use where possible; if used, monitor for QT-related symptoms and consider an ECG.
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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