Product image of Haldol (Haloperidol) supplied by GNH India

Haldol

Active Ingredient:
Haloperidol
Origin:
EU

Haldol (Haloperidol)

Haldol is an injectable solution containing the antipsychotic haloperidol. It is supplied in a strength for intramuscular administration and is marketed in the European Union as a prescription medication. Haloperidol belongs to the butyrophenone class and works primarily as a dopamine D2 receptor antagonist. It is prescribed when oral therapy is not feasible or rapid symptom control is needed. The drug is available only with a healthcare provider’s authorization.

Manufacturer / TM Owner

Essential Pharma Limited

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Indications & Clinical Uses

Haloperidol injectable solution is indicated for several acute psychiatric conditions that require rapid control of symptoms.

  • Schizophrenia, particularly acute exacerbations.
  • Acute psychosis associated with mood disorders.
  • Mania episodes in bipolar disorder.
  • Severe agitation or aggression requiring intramuscular therapy.
  • Tourette syndrome when oral agents are insufficient.

Side Effects

Side effects of haloperidol injection vary in frequency and severity.

Common

  • Drowsiness or sedation.
  • Extrapyramidal symptoms such as tremor or rigidity.
  • Dry mouth and increased salivation.
  • Orthostatic hypotension or dizziness.
  • Blurred vision or other visual disturbances.

Serious

  • Neuroleptic malignant syndrome, a life‑threatening reaction.
  • Tardive dyskinesia with persistent involuntary movements.
  • Severe cardiac arrhythmias, including QT prolongation.
  • Seizures or loss of consciousness.

Precautions & Warnings

When prescribing haloperidol injection, clinicians should consider several precautionary measures to minimize risk.

  • Assess for a history of cardiovascular disease or arrhythmias.
  • Monitor for signs of extrapyramidal reactions, especially in young patients.
  • Use the lowest effective dose and limit duration of therapy.
  • Evaluate liver and kidney function before initiating treatment.
  • Caution in patients with a personal or family history of seizures.
  • Avoid use during pregnancy unless benefits outweigh risks (category unknown).
  • Review any history of neuroleptic malignant syndrome.

Avoid Interactions

Haloperidol can interact with other medications, affecting its efficacy or safety profile.

Avoid

  • Other dopamine antagonists or antipsychotics that may increase extrapyramidal risk.
  • Drugs that prolong the QT interval, such as certain antiarrhythmics or macrolide antibiotics.
  • Strong CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin) that raise haloperidol levels.

Use with caution

  • CNS depressants, including benzodiazepines and opioids, which can enhance sedation.
  • Anticholinergic agents, which may mask early signs of extrapyramidal symptoms.
  • Alcohol, because it may increase drowsiness and hypotension.

Frequently Asked Questions

Haldol haloperidol injection is commonly used to manage acute episodes of schizophrenia, acute psychosis, bipolar mania, severe agitation, and Tourette syndrome when rapid symptom control is needed.

Haloperidol acts primarily as a dopamine D2 receptor antagonist, reducing dopamine activity in the brain, which helps alleviate psychotic symptoms and severe agitation.

The pregnancy category for haloperidol is listed as unknown; it should only be used during pregnancy if the potential benefits outweigh the risks and under close medical supervision.

Common side effects include drowsiness, extrapyramidal symptoms such as tremor or rigidity, dry mouth, increased salivation, orthostatic hypotension, and visual disturbances.

Serious reactions include neuroleptic malignant syndrome, tardive dyskinesia, severe cardiac arrhythmias (e.g., QT prolongation), seizures, and loss of consciousness.

Yes, because haloperidol can prolong the QT interval, clinicians often obtain baseline and periodic ECGs, especially in patients with cardiac risk factors.

Combining haloperidol with other dopamine antagonists can increase the risk of extrapyramidal symptoms and should generally be avoided unless specifically directed by a specialist.

Drugs that also prolong the QT interval—such as certain antiarrhythmics (e.g., amiodarone), macrolide antibiotics (e.g., clarithromycin), and some antipsychotics—should be avoided with haloperidol.

Impaired hepatic or renal function can reduce clearance of haloperidol, so dose adjustments and close monitoring are recommended in these patients.

Alcohol may increase drowsiness and hypotension, so patients are advised to limit or avoid alcohol while being treated with haloperidol.

Severe muscle rigidity could signal neuroleptic malignant syndrome; the caregiver should seek emergency medical care immediately.

Routine monitoring of liver and kidney function, as well as electrolytes and ECG when indicated, helps detect potential complications early.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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