Product image of Haldol (Haloperidol) supplied by GNH India

Haldol

Active Ingredient:
Haloperidol
Origin:
EU

Haldol (Haloperidol)

Haldol is the brand name for the oral antipsychotic medication haloperidol, a butyrophenone derivative marketed in the European Union. It is a prescription‑only drug that acts as a dopamine D2 receptor antagonist and is used to manage several psychiatric and neurological conditions. The formulation is taken by mouth and is classified within the antipsychotic therapeutic class.

Manufacturer / TM Owner

Essential Pharma Limited

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Indications & Clinical Uses

Haloperidol is prescribed for several psychiatric and neurological conditions where dopamine blockade is therapeutic.

  • Schizophrenia
  • Acute psychosis
  • Manic episodes of bipolar disorder
  • Tourette syndrome
  • Severe agitation requiring rapid control
  • Treatment‑resistant psychotic symptoms

Side Effects

Side effects of haloperidol vary in frequency and severity, ranging from mild to potentially serious.

Common

  • Drowsiness
  • Dry mouth
  • Constipation
  • Restlessness (akathisia)

Serious

  • Extrapyramidal symptoms such as severe dystonia or parkinsonism
  • Neuroleptic malignant syndrome
  • Tardive dyskinesia
  • Cardiac arrhythmias, including QT interval prolongation

Precautions & Warnings

When prescribing haloperidol, clinicians should consider several safety factors to minimize risk.

  • Evaluate cardiovascular status, especially for QT prolongation risk
  • Monitor regularly for extrapyramidal symptoms and movement disorders
  • Use caution in patients with a history of seizures
  • Avoid in individuals with known severe QT prolongation
  • Assess liver function as haloperidol is hepatically metabolized
  • Consider potential risks during pregnancy and lactation
  • Review for coexisting substance‑use disorders or severe depression

Avoid Interactions

Haloperidol can interact with other medicines, affecting its safety and effectiveness.

Avoid

  • Other dopamine‑blocking agents
  • Drugs that prolong the QT interval
  • Central nervous system depressants that increase sedation

Use with caution

  • Antihypertensive agents, which may enhance hypotensive effects
  • Antidepressants, particularly SSRIs, that can affect serotonin balance
  • CYP3A4 inhibitors or inducers, which may alter haloperidol plasma levels

Frequently Asked Questions

Haloperidol works primarily as a dopamine D2 receptor antagonist, reducing dopaminergic neurotransmission in the brain.

Haldol is commonly used to treat schizophrenia, acute psychotic episodes, manic phases of bipolar disorder, and Tourette syndrome.

Yes, haloperidol is formulated for oral administration, typically as tablets or liquid preparations.

Yes, haloperidol may cause extrapyramidal symptoms such as akathisia, dystonia, parkinsonism, and, with long‑term use, tardive dyskinesia.

Symptoms include high fever, muscle rigidity, autonomic instability, and altered mental status; it requires immediate medical attention.

Patients at risk for QT prolongation should have baseline and periodic ECG monitoring to detect potential arrhythmias.

The safety of haloperidol in pregnancy has not been fully established; clinicians weigh potential benefits against unknown risks.

CYP3A4 inhibitors can increase haloperidol plasma concentrations, potentially enhancing side effects.

Combining haloperidol with other dopamine antagonists is generally avoided due to increased risk of severe side effects.

Patients should inform their healthcare provider, as dosage adjustment or alternative therapy may be needed.

No specific dietary restrictions are required, but patients should avoid alcohol, which can increase sedation.

Clinical response varies; some patients notice improvement within days, while full effects may take several weeks.

Published by

GNH India Pharmaceuticals Limited

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Last updated:

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