Drug interactions
Risperidone + Thiothixene
Severity: Moderate
Risperidone 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 increases the burden of dopamine blockade, raising the risk of extrapyramidal symptoms, sedation and rarely neuroleptic malignant syndrome. Benefit over monotherapy is not well established.
What this interaction means in plain words
Risperidone 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 D2 receptor antagonism and sedative effects.
What to do
Avoid antipsychotic polypharmacy when possible; if combined, monitor for EPS, sedation and fever or rigidity and use the lowest 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 Risperidone
- Ibutilide + Risperidone Contraindicated
- Risperidone + Vandetanib Contraindicated
- Adagrasib + Risperidone Major
- Amiodarone + Risperidone Major
- Amisulpride + Risperidone Major
- Amoxapine + Risperidone Major
Frequently asked questions
Can I take Risperidone with Thiothixene?
MediHelp rates the interaction as moderate. Risperidone 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 increases the burden of dopamine blockade, raising the risk of extrapyramidal symptoms, sedation and rarely neuroleptic malignant syndrome. Benefit over monotherapy is not well established.
How serious is the interaction between Risperidone 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 when possible; if combined, monitor for EPS, sedation and fever or rigidity and use the lowest doses.
What other medicines interact with Risperidone?
MediHelp also lists interactions of Risperidone with, for example, Ibutilide, Vandetanib, Adagrasib. The full list is on the Risperidone page.
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