Drug interactions
Loxapine + Thiothixene
Severity: Moderate
Loxapine 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
Two antipsychotics together add to dopamine blockade, raising the risk of extrapyramidal symptoms, sedation, anticholinergic effects and neuroleptic malignant syndrome. Additive QT effects and orthostatic hypotension are also possible.
What this interaction means in plain words
Loxapine 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 receptor antagonism, with additive sedative, anticholinergic and alpha-adrenergic effects.
What to do
Avoid antipsychotic polypharmacy where possible. If used, monitor for extrapyramidal symptoms, sedation, hyperthermia and rigidity, and review the need for both.
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 Loxapine
- Alfentanil + Loxapine Major
- Alprazolam + Loxapine Major
- Amisulpride + Loxapine Major
- Amoxapine + Loxapine Major
- Apomorphine + Loxapine Major
- Belladonna and opium + Loxapine Major
Frequently asked questions
Can I take Loxapine with Thiothixene?
MediHelp rates the interaction as moderate. Loxapine 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. Two antipsychotics together add to dopamine blockade, raising the risk of extrapyramidal symptoms, sedation, anticholinergic effects and neuroleptic malignant syndrome. Additive QT effects and orthostatic hypotension are also possible.
How serious is the interaction between Loxapine 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 extrapyramidal symptoms, sedation, hyperthermia and rigidity, and review the need for both.
What other medicines interact with Loxapine?
MediHelp also lists interactions of Loxapine with, for example, Alfentanil, Alprazolam, Amisulpride. The full list is on the Loxapine page.
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