Drug interactions
Thiothixene + Ziprasidone
Severity: Major
Thiothixene and Ziprasidone: 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
Combining two antipsychotics increases the risk of extrapyramidal symptoms, sedation and neuroleptic malignant syndrome. Both can also prolong the QT interval, and thiothixene is a typical antipsychotic with high dopamine blockade.
What this interaction means in plain words
Thiothixene and Ziprasidone 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.
Why it happens
Additive dopamine D2 receptor antagonism, sedation and QT interval prolongation.
What to do
Avoid antipsychotic polypharmacy where possible. If used together, monitor ECG, electrolytes and extrapyramidal and neuroleptic malignant syndrome signs.
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?
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Other interactions of Ziprasidone
- Amiodarone + Ziprasidone Contraindicated
- Amitriptyline + Ziprasidone Contraindicated
- Arsenic trioxide + Ziprasidone Contraindicated
- Bedaquiline + Ziprasidone Contraindicated
- Chloroquine + Ziprasidone Contraindicated
- Citalopram + Ziprasidone Contraindicated
Frequently asked questions
Can I take Thiothixene with Ziprasidone?
MediHelp rates the interaction as major. Thiothixene and Ziprasidone 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. Combining two antipsychotics increases the risk of extrapyramidal symptoms, sedation and neuroleptic malignant syndrome. Both can also prolong the QT interval, and thiothixene is a typical antipsychotic with high dopamine blockade.
How serious is the interaction between Thiothixene and Ziprasidone?
MediHelp rates it major, 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 together, monitor ECG, electrolytes and extrapyramidal and neuroleptic malignant syndrome signs.
What other medicines interact with Ziprasidone?
MediHelp also lists interactions of Ziprasidone with, for example, Amiodarone, Amitriptyline, Arsenic trioxide. The full list is on the Ziprasidone page.
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