Drug interactions
Chlorpromazine + Thiothixene
Severity: Moderate
Chlorpromazine and Thiothixene: 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
Using two antipsychotics together adds dopamine blockade, raising the risk of extrapyramidal symptoms, tardive dyskinesia and neuroleptic malignant syndrome. Sedation, hypotension, anticholinergic effects and QT prolongation can also be additive.
What this interaction means in plain words
Chlorpromazine and Thiothixene 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 dopamine D2 antagonism and overlapping sedative, anticholinergic and cardiac effects.
What to do
Avoid antipsychotic polypharmacy where possible; if used, monitor for movement disorders, sedation and ECG changes at the lowest effective doses.
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 Chlorpromazine
- Chlorpromazine + Dofetilide Contraindicated
- Chlorpromazine + Dronedarone Contraindicated
- Chlorpromazine + Droperidol Contraindicated
- Chlorpromazine + Ibutilide Contraindicated
- Chlorpromazine + Metrizamide Contraindicated
- Chlorpromazine + Panobinostat Contraindicated
Frequently asked questions
Can I take Chlorpromazine with Thiothixene?
MediHelp rates the interaction as moderate. Chlorpromazine and Thiothixene 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. Using two antipsychotics together adds dopamine blockade, raising the risk of extrapyramidal symptoms, tardive dyskinesia and neuroleptic malignant syndrome. Sedation, hypotension, anticholinergic effects and QT prolongation can also be additive.
How serious is the interaction between Chlorpromazine and Thiothixene?
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 antipsychotic polypharmacy where possible; if used, monitor for movement disorders, sedation and ECG changes at the lowest effective doses.
What other medicines interact with Chlorpromazine?
MediHelp also lists interactions of Chlorpromazine with, for example, Dofetilide, Dronedarone, Droperidol. The full list is on the Chlorpromazine page.
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