Haldol (Haloperidol)

Haldol is indicated for the management of several psychiatric disorders where dopamine dysregulation is a factor.

• Treatment of schizophrenia, including maintenance therapy.
• Management of acute psychotic episodes.
• Control of manic episodes associated with bipolar disorder.
• Reduction of motor and vocal tics in Tourette syndrome.
• Adjunctive therapy for severe agitation in various mental health settings.

Side effects of haloperidol can vary in frequency and severity, and patients should be monitored regularly.

Common

• Drowsiness or sedation.
• Extrapyramidal symptoms such as tremor, rigidity, or akathisia.
• Dry mouth and constipation.
• Blurred vision.
• Weight gain.
• Orthostatic hypotension.

Serious

• Tardive dyskinesia (involuntary movements).
• Neuroleptic malignant syndrome (fever, muscle rigidity).
• Severe cardiac arrhythmias (QT prolongation).
• Hyperprolactinemia leading to hormonal disturbances.
• Agranulocytosis (low white blood cell count).

When prescribing or taking Haldol, several safety considerations are important.

• Assess cardiovascular risk, especially for QT prolongation.
• Monitor for signs of extrapyramidal symptoms and tardive dyskinesia.
• Use caution in patients with a history of seizures or neurological disorders.
• Evaluate liver and kidney function before initiating therapy.
• Discuss pregnancy and breastfeeding considerations with a healthcare provider.
• Adjust dose in elderly patients to reduce fall risk.
• Review any history of substance abuse or medication non‑adherence.

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

Avoid

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

Use with caution

• CNS depressants such as benzodiazepines or opioids, which may enhance sedation.
• Anticholinergic agents that can mask extrapyramidal symptoms.
• Antihypertensive drugs, as haloperidol may cause orthostatic hypotension.
• CYP2D6 substrates, which could be affected by metabolic competition.