Drug interactions
Olanzapine + Zotepine
Severity: Moderate
Olanzapine and Zotepine: 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
Combining two antipsychotics increases dopamine blockade, raising the risk of extrapyramidal symptoms and neuroleptic malignant syndrome. Zotepine also lowers the seizure threshold and both agents are sedating.
What this interaction means in plain words
Olanzapine and Zotepine 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
Additive D2 antagonism and sedative effects.
What to do
Avoid combining the two when possible; if necessary, use low doses and monitor for movement disorders, sedation, seizures and hyperthermia.
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 Olanzapine and Zotepine, 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 14 days on the web. No card needed.
Other interactions of Olanzapine
Frequently asked questions
Can I take Olanzapine with Zotepine?
MediHelp rates the interaction as moderate. Olanzapine and Zotepine 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. Combining two antipsychotics increases dopamine blockade, raising the risk of extrapyramidal symptoms and neuroleptic malignant syndrome. Zotepine also lowers the seizure threshold and both agents are sedating.
How serious is the interaction between Olanzapine and Zotepine?
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 combining the two when possible; if necessary, use low doses and monitor for movement disorders, sedation, seizures and hyperthermia.
What other medicines interact with Olanzapine?
MediHelp also lists interactions of Olanzapine with, for example, Amisulpride, Amoxapine, Apomorphine. The full list is on the Olanzapine 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.
