Drug interactions
Haloperidol + Lithium
Severity: Major
Haloperidol and Lithium: 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
Lithium with haloperidol has been associated with neurotoxicity, including severe extrapyramidal symptoms, confusion, fever and encephalopathy-like states, mostly at higher doses. Neuroleptic malignant syndrome has also been reported.
What this interaction means in plain words
Haloperidol and Lithium 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.
Haloperidol belongs to Central Nervous System; Lithium belongs to Central Nervous System.
Why it happens
Additive dopamine blockade and CNS toxicity, with the exact mechanism not fully defined.
What to do
Use the lowest effective haloperidol dose and monitor lithium levels and neurological status closely. Discontinue both agents if signs of neurotoxicity or neuroleptic malignant syndrome occur.
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
Other interactions of Haloperidol
- Dofetilide + Haloperidol Contraindicated
- Dronedarone + Haloperidol Contraindicated
- Haloperidol + Ibutilide Contraindicated
- Haloperidol + Levoketoconazole Contraindicated
- Haloperidol + Panobinostat Contraindicated
- Haloperidol + Pimozide Contraindicated
Frequently asked questions
Can I take Haloperidol with Lithium?
MediHelp rates the interaction as major. Haloperidol and Lithium 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. Lithium with haloperidol has been associated with neurotoxicity, including severe extrapyramidal symptoms, confusion, fever and encephalopathy-like states, mostly at higher doses. Neuroleptic malignant syndrome has also been reported.
How serious is the interaction between Haloperidol and Lithium?
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 haloperidol dose and monitor lithium levels and neurological status closely. Discontinue both agents if signs of neurotoxicity or neuroleptic malignant syndrome occur.
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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