Drug interactions
Lithium + Thiothixene
Severity: Major
Lithium and Thiothixene: 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 lithium with an antipsychotic has been associated with neurotoxicity, extrapyramidal symptoms and rarely neuroleptic malignant syndrome or serotonin toxicity. Both drugs may also prolong the QT interval.
What this interaction means in plain words
Lithium and Thiothixene 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 central dopaminergic and serotonergic effects plus additive effects on cardiac repolarization.
What to do
Use the lowest effective doses, monitor lithium levels, and watch for rigidity, fever, confusion and tremor. Obtain an ECG when there are other QT risk factors.
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 Lithium
- Lithium + Thioridazine Contraindicated
- Lithium + Vandetanib Contraindicated
- Aceclofenac + Lithium Major
- Acemetacin + Lithium Major
- Amisulpride + Lithium Major
- Amlodipine-benazepril + Lithium Major
Frequently asked questions
Can I take Lithium with Thiothixene?
MediHelp rates the interaction as major. Lithium and Thiothixene 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 lithium with an antipsychotic has been associated with neurotoxicity, extrapyramidal symptoms and rarely neuroleptic malignant syndrome or serotonin toxicity. Both drugs may also prolong the QT interval.
How serious is the interaction between Lithium and Thiothixene?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective doses, monitor lithium levels, and watch for rigidity, fever, confusion and tremor. Obtain an ECG when there are other QT risk factors.
What other medicines interact with Lithium?
MediHelp also lists interactions of Lithium with, for example, Thioridazine, Vandetanib, Aceclofenac. The full list is on the Lithium page.
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