Levomepromazine Tablets (Nozinan): Uses, Dosage, Risks

About levomepromazine

Levomepromazine, commonly known by the brand name Nozinan, belongs to a class of medications called phenothiazines, which are antipsychotic drugs. It is primarily used in two key contexts: to alleviate distressing symptoms in individuals receiving palliative care, particularly those who are terminally ill, and to manage symptoms of schizophrenia. In palliative care, levomepromazine is often administered via injection to help control severe symptoms such as pain, nausea and vomiting, restlessness, and confusion. This medication works by influencing the balance of chemical substances in the brain, particularly by blocking dopamine receptors, which helps calm overactive neural pathways.

For terminally ill patients, levomepromazine provides significant relief without the need for opioids in some cases, making it valuable in end-of-life care. It is more sedative and potent than chlorpromazine, another phenothiazine, offering enhanced calming effects. In schizophrenia treatment, it addresses core symptoms like hallucinations, delusions, mistaken beliefs, and excessive suspicion by stabilizing thought processes and behaviors. Schizophrenia is a chronic mental health condition affecting thoughts, feelings, and behaviors, and levomepromazine helps restore chemical balance in the brain to mitigate these effects.

The drug is available in tablet form (typically 25 mg and 100 mg) and as an injectable solution (25 mg/mL), allowing flexibility in administration based on patient needs. Tablets are round, with the 25 mg version measuring 8.7 mm in diameter and the 100 mg at 11.0 mm. Injections can be given intramuscularly, intravenously (after dilution), or via continuous subcutaneous infusion using a syringe driver, which is common in palliative settings for steady symptom control over 24 hours.

Before taking levomepromazine

Before starting levomepromazine, it is crucial to inform your doctor about your full medical history to ensure safety. Certain conditions may contraindicate its use or require dosage adjustments and close monitoring. Key precautions include:

• Pregnancy or breastfeeding: Levomepromazine may harm the fetus or pass into breast milk; discuss risks with your doctor.
• Heart conditions or blood vessel disease: It can cause postural hypotension (low blood pressure upon standing), leading to dizziness or fainting.
• Liver, kidney, or prostate problems: Impaired organ function can affect drug metabolism and increase side effect risks.
• Breathing difficulties: Such as asthma or chronic obstructive pulmonary disease (COPD), as it may suppress respiration.
• Neurological conditions: Epilepsy, Parkinson’s disease, or myasthenia gravis, due to potential worsening of symptoms or seizures.
• Mental health issues: Depression, as it may exacerbate mood disorders.
• Eye conditions: Glaucoma (raised intraocular pressure).
• Past jaundice or blood disorders: Risk of recurrence or hematological issues.
• Phaeochromocytoma: A tumor on the adrenal gland that can interact dangerously with the drug.
• Allergies: Especially to phenothiazines or any ingredients in Nozinan tablets.
• Other medications: Including over-the-counter, herbal, or complementary therapies, as interactions are common (e.g., with antidepressants, heart drugs, or alcohol).

Elderly patients, particularly those with dementia, face heightened risks of severe side effects like heart failure, irregular heartbeat, pneumonia, or stroke, which can be fatal. Additional monitoring is needed for diabetes (blood sugar checks), electrolyte imbalances (low potassium, calcium, or magnesium), constipation, or alcohol use disorders. Patients should remain lying down for at least one hour post-injection to mitigate hypotension risks.

How to take levomepromazine

Always follow your doctor’s precise instructions and read the patient information leaflet (PIL) provided with the medication for detailed guidance on usage, side effects, and storage. Levomepromazine dosing starts low and titrates upward to minimize side effects.

For tablets:

• Typically prescribed as three doses per day, swallowed whole with water, with or without food.
• Initial dose for schizophrenia: 1-3 tablets (25-75 mg) daily, divided; up to 4-8 tablets for bedridden patients.
• Maintain consistent timing daily for steady blood levels.

For injections (palliative care):

• Adults: 12.5-25 mg (0.5-1 mL) IM or IV (diluted); up to 50 mg every 6-8 hours for severe agitation.
• Continuous subcutaneous infusion: Suitable for 24-hour delivery via syringe driver.

Missed dose: Skip it and take the next scheduled dose; never double up.

Inform healthcare providers of levomepromazine use before surgery, dental work, or anesthesia, as it can enhance sedative effects. Consult a pharmacist before adding over-the-counter remedies.

Getting the most out of your treatment

To optimize benefits, adhere strictly to the prescribed regimen. Regular doctor visits allow for dose adjustments based on response and side effects. In palliative care, it complements other symptom management without causing vomiting, unlike some painkillers. For schizophrenia, combining with therapy enhances long-term outcomes. Lifestyle tips include avoiding alcohol, staying hydrated, and monitoring for interactions.

Possible side effects

Levomepromazine, like all antipsychotics, can cause side effects, though not everyone experiences them. Common ones are manageable, but serious reactions require immediate medical attention.

Serious side effects (urgent): Muscle stiffness, high fever, confusion, fast heartbeat, sweating—signs of neuroleptic malignant syndrome (NMS). Also report allergic reactions (rash, swelling), vision changes, prolonged erections, blood disorders, or involuntary movements (extrapyramidal symptoms). Overdose symptoms: severe drowsiness, convulsions, low blood pressure, irregular heartbeat, hypothermia—seek emergency care immediately.

Long-term use may require blood tests for liver function, blood counts, and eye/heart checks.

Frequently Asked Questions (FAQs)

Q: Can levomepromazine be used in children?

A: Generally not recommended for children; adult dosing applies, with max 1.5 tablets daily if prescribed. Consult a specialist.

Q: Does it cause weight gain?

A: Possible, along with metabolic changes; monitor diet and blood sugar with your doctor.

Q: How long does it take to work?

A: Sedative effects rapid (hours); schizophrenia symptom relief may take days to weeks.

Q: Is it safe with alcohol?

A: No—enhances sedation and hypotension; avoid completely.

Q: What if I overdose?

A: Contact emergency services immediately; symptoms include unconsciousness and seizures.

How to store levomepromazine

Store tablets below 25°C in original packaging, away from light and moisture. Keep out of reach of children. Discard unused medicine via pharmacy take-back programs. Injections: Follow storage per PIL.

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medha deb

 

Medha Deb is an editor with a master's degree in Applied Linguistics from the University of Hyderabad. She believes that her qualification has helped her develop a deep understanding of language and its application in various contexts.

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