Norphex (Levomepromazine Maleate)

Levomepromazine, the active ingredient in Norphex, is a phenothiazine presented as an oral tablet for oral use. It is employed to manage schizophrenia, severe agitation, nausea and vomiting, and to provide sedation in palliative care settings. Its pharmacological profile includes dopamine D2 antagonism together with histamine H1, muscarinic and alpha‑adrenergic blockade, producing antipsychotic, antiemetic and sedative effects.

GNH USA supplies Norphex as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide, with reliable logistics and quality assurance.

Levomepromazine is a phenothiazine antipsychotic that acts on dopamine pathways and is indicated for several clinical conditions.

- Schizophrenia: reduces psychotic symptoms in patients with schizophrenia. - Severe agitation: calms acute agitation and aggressive behavior. - Nausea and vomiting: controls chemotherapy‑induced or postoperative nausea. - Palliative care sedation: provides sedation for patients requiring end‑of‑life comfort.

Levomepromazine may cause a range of adverse reactions, which are categorized by frequency and severity.

Common Side Effects: - Sedation: excessive drowsiness or sleepiness. - Orthostatic hypotension: dizziness upon standing. - Anticholinergic effects: dry mouth, blurred vision, constipation. - Weight gain: increase in body weight over time.

Serious or Rare Side Effects: - Neuroleptic malignant syndrome: life‑threatening fever and muscle rigidity. - Severe hypotension: marked drop in blood pressure requiring medical attention. - Cardiac arrhythmia: irregular heart rhythm, including QT prolongation. - Agranulocytosis: dangerously low white‑blood‑cell count.

When prescribing Levomepromazine, clinicians should observe several precautionary measures to minimize risk.

- Blood pressure monitoring: check for orthostatic changes regularly. - Extrapyramidal assessment: observe for muscle rigidity or tremor. - Hepatic function evaluation: assess liver enzymes before and during therapy. - Elderly caution: start with lower doses due to increased sensitivity. - Drug discontinuation: avoid abrupt cessation to prevent withdrawal phenomena. - Store at ambient temperature: keep in original packaging, protect from moisture.

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

Major Interactions (Avoid): - CNS depressants: additive sedation with opioids or benzodiazepines. - Antihypertensives: enhanced hypotensive effect. - QT‑prolonging agents: increased risk of cardiac arrhythmias.

Moderate Interactions (Monitor Closely): - CYP2D6 inhibitors: may raise levomepromazine plasma levels. - Lithium: potential for increased neurotoxicity.