Levorol (Levomepromazine Maleate)

Levorol (levomepromazine) acts on dopaminergic pathways and is indicated for several psychiatric and supportive‑care conditions.

• Schizophrenia: helps control psychotic symptoms such as delusions and hallucinations.
• Severe agitation: calms acute behavioral disturbances when rapid sedation is required.
• Nausea and vomiting: reduces emesis associated with chemotherapy, postoperative states, or other causes.
• Palliative care: provides symptom control for pain, anxiety, and distress in terminal illness.

• Levomepromazine antagonizes dopamine D2 receptors while also blocking histamine H1, muscarinic, and alpha‑adrenergic receptors. This multi‑receptor profile reduces dopaminergic neurotransmission, produces sedation, and diminishes nausea, contributing to its antipsychotic, antiemetic, and tranquilizing effects.

Levomepromazine may cause a range of adverse reactions that vary in frequency and severity.

Common Side Effects

• Drowsiness: excessive sleepiness or fatigue.
• Dry mouth: reduced salivation leading to discomfort.
• Constipation: slowed gastrointestinal motility.
• Orthostatic hypotension: drop in blood pressure upon standing.
• Blurred vision: temporary visual disturbances.
• Weight gain: increase in body weight over time.

Serious or Rare Side Effects

• Neuroleptic malignant syndrome: life‑threatening reaction with fever and muscle rigidity.
• Severe hypotension: marked drop in blood pressure causing dizziness or fainting.
• Cardiac arrhythmia: irregular heart rhythm, especially in patients with pre‑existing heart disease.
• Agranulocytosis: dangerous drop in white blood cells.
• Seizures: occurrence of convulsive episodes.
• Tardive dyskinesia: persistent involuntary movements after prolonged use.

When prescribing levomepromazine, clinicians should observe several safety measures.

• Blood pressure monitoring: check for orthostatic hypotension, especially after dose changes.
• Cardiac assessment: evaluate for QT prolongation or existing arrhythmias.
• Extrapyramidal vigilance: watch for signs of movement disorders.
• Elderly caution: start low and increase slowly to reduce sedation and falls.
• Discontinuation: avoid abrupt cessation to prevent withdrawal phenomena.
• Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Levomepromazine can interact with other medicines, altering its efficacy or safety.

Major Interactions (Avoid)

• CNS depressants: may intensify sedation and respiratory depression.
• Anticholinergic agents: increase risk of severe anticholinergic toxicity.
• Antihypertensives: additive hypotensive effect.
• Other dopamine antagonists: enhance extrapyramidal symptoms.
• MAO inhibitors: risk of hypertensive crisis.

Moderate Interactions (Monitor Closely)

• CYP450 inhibitors/inducers: may change levomepromazine plasma levels.
• Alcohol: potentiates central nervous system depression.
• Antihistamines: increase sedation.
• SSRIs: monitor for serotonin syndrome.
• Antiepileptics: may affect seizure threshold.