Product image of Haldol Decanoas (Haloperidol Decanoate) supplied by GNH India

Haldol Decanoas

Active Ingredient:
Haloperidol Decanoate
Origin:
EU

Haldol Decanoas (Haloperidol Decanoate)

Haldol Decanoas is a pharmaceutical product containing haloperidol decanoate, supplied as an intramuscular injection. It is a long‑acting formulation of the typical antipsychotic haloperidol, marketed in the European Union. The preparation is intended for prescription use and classified as a dopamine D2 receptor antagonist for managing certain psychiatric conditions. It provides sustained plasma levels, allowing dosing intervals of several weeks, and is administered by a healthcare professional.

Manufacturer / TM Owner

Essential Pharma Limited

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Indications & Clinical Uses

Haloperidol decanoate administered as Haldol Decanoas is indicated for several psychiatric indications where long‑acting antipsychotic therapy is appropriate. The intramuscular formulation delivers steady drug concentrations over weeks, supporting both acute and maintenance treatment strategies in adult patients.

  • Schizophrenia (maintenance therapy)
  • Acute psychotic episodes requiring rapid control
  • Prevention of relapse in patients stabilized on oral haloperidol
  • Management of severe agitation in psychotic patients
  • Adjunctive use when oral adherence is problematic

Side Effects

Haloperidol decanoate may cause a range of side effects, some of which are common and generally mild, while others are serious and require prompt medical attention.

Common

  • Drowsiness or sedation
  • Dry mouth
  • Constipation
  • Weight gain or increased appetite

Serious

  • Extrapyramidal symptoms such as dystonia or akathisia
  • Tardive dyskinesia with long‑term use
  • Neuroleptic malignant syndrome, a rare life‑threatening reaction
  • Significant orthostatic hypotension or cardiac arrhythmia

Precautions & Warnings

When prescribing Haldol Decanoas, clinicians should evaluate patient-specific factors and monitor for potential complications throughout therapy.

  • Assess cardiovascular status before initiating therapy
  • Monitor for signs of movement disorders during treatment
  • Use caution in patients with a history of seizures
  • Evaluate liver and renal function periodically
  • Discuss pregnancy and breastfeeding considerations with the patient
  • Avoid abrupt discontinuation to reduce withdrawal risk
  • Consider dose adjustments in elderly patients

Avoid Interactions

Haloperidol decanoate can interact with other medicines, influencing its effectiveness or safety profile. Some combinations should be avoided, while others require careful monitoring.

Avoid

  • Concurrent use with other dopamine antagonists may increase extrapyramidal risk
  • Combining with strong CYP3A4 inhibitors can raise haloperidol levels
  • Co‑administration with QT‑prolonging agents may heighten cardiac risk

Use with caution

  • Moderate CYP3A4 inducers may reduce efficacy; monitor response
  • Anticholinergic medications can mask early signs of extrapyramidal symptoms
  • Alcohol or sedatives may enhance central nervous system depression

Frequently Asked Questions

Haldol Decanoas is a prescription‑only, long‑acting intramuscular injection containing the active ingredient haloperidol decanoate, a typical antipsychotic of the butyrophenone class.

Haloperidol decanoate acts as a dopamine D2 receptor antagonist, blocking dopamine neurotransmission and helping to reduce psychotic symptoms.

It is commonly prescribed for schizophrenia, acute psychosis, maintenance therapy to prevent relapse, and control of severe agitation in psychotic patients.

The medication is administered by intramuscular injection, usually in the gluteal or deltoid muscle, by a qualified healthcare professional.

Because it is a long‑acting formulation, injections are typically spaced several weeks apart, but the exact interval is determined by the prescribing clinician.

Common side effects include drowsiness, dry mouth, constipation, and weight gain or increased appetite.

Serious reactions can include extrapyramidal symptoms, tardive dyskinesia, neuroleptic malignant syndrome, and significant cardiac effects such as orthostatic hypotension or arrhythmia.

Patients should avoid concurrent use of other dopamine antagonists, strong CYP3A4 inhibitors, and drugs that prolong the QT interval, unless closely monitored.

Elderly patients may be more sensitive to sedation, orthostatic hypotension, and extrapyramidal effects, so dose adjustments and careful monitoring are recommended.

The pregnancy safety category for haloperidol decanoate is not clearly established; clinicians should weigh potential benefits against risks and discuss options with the patient.

Alcohol may enhance central nervous system depression and should be used with caution or avoided while on haloperidol decanoate.

Regular assessment of movement disorders, cardiovascular status, liver and kidney function, and metabolic parameters such as weight and glucose is advised.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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