Neuleptil (Periciazine)

Periciazine is a typical antipsychotic that acts on dopamine pathways to manage psychotic disorders.

• Schizophrenia: reduces hallucinations, delusions and thought disorder.
• Acute psychosis: controls sudden emergence of psychotic symptoms and stabilises mental state.
• Psychotic disorders (broad): alleviates core psychotic features across related conditions.

• Periciazine exerts its antipsychotic effect primarily by antagonising dopamine D2 receptors in the central nervous system, thereby decreasing dopaminergic neurotransmission. It also blocks histamine H1 and alpha‑1 adrenergic receptors, contributing to its sedative and hypotensive properties, and may influence other neurotransmitter systems involved in mood and cognition.

Periciazine may cause a range of adverse reactions, some of which are more frequently observed than others.

Common Side Effects

• Drowsiness: feeling unusually sleepy or fatigued.
• Dry mouth: reduced salivation leading to discomfort.
• Constipation: slowed gastrointestinal motility.
• Orthostatic hypotension: dizziness upon standing due to blood pressure drop.

Serious or Rare Side Effects

• Neuroleptic malignant syndrome: life‑threatening reaction with fever and muscle rigidity.
• Tardive dyskinesia: involuntary, repetitive movements that may be irreversible.
• Severe hypotension: marked drop in blood pressure requiring medical attention.

When prescribing periciazine, clinicians should consider several safety measures.

• Blood pressure monitoring: watch for orthostatic changes, especially after dose initiation.
• Extrapyramidal assessment: evaluate for tremor, rigidity, or abnormal movements.
• Cardiac evaluation: review history of arrhythmias or conduction disorders.
• Elderly caution: increased risk of sedation and falls in older adults.
• Hypersensitivity: discontinue if allergic reactions such as rash or swelling occur.
• Store at room temperature: keep in the original packaging, protect from moisture and direct sunlight.

Periciazine can interact with other medicines, altering efficacy or safety.

Major Interactions (Avoid)

• CNS depressants (e.g., benzodiazepines): may enhance sedation and respiratory depression.
• Antihypertensives: additive hypotensive effect leading to dizziness or fainting.
• Anticholinergic agents: increase risk of severe constipation and urinary retention.

Moderate Interactions (Monitor Closely)

• CYP2D6 inhibitors (e.g., fluoxetine): may raise periciazine plasma levels.
• QT‑prolonging drugs: combined effect could predispose to cardiac arrhythmias.