About levomepromazine
Phenothiazine antipsychotic
Used for
- Treats schizophrenia and other psychotic disorders
- Relieves severe agitation or distress in some settings
- Used for severe pain or nausea in palliative care
Usual adult dose
Psychiatric doses vary; commonly started at 25–50 mg daily, then adjusted by a clinician. Palliative doses are individualized.
Common side effects
- Sleepiness and dizziness
- Dry mouth, constipation, or blurred vision
- Low blood pressure, especially when standing
- Weight gain or movement problems
Important warnings
- Can cause marked drowsiness; avoid alcohol and use caution driving.
- May cause falls, fainting, or abnormal heart rhythms.
- Seek urgent care for high fever with muscle stiffness or confusion.
- Use caution with older adults and people with heart, liver, or seizure conditions.
Pregnancy
Use only when clearly needed; treatment near delivery may affect the newborn. Discuss risks with a clinician.
Breastfeeding
May cause infant drowsiness or other effects; breastfeeding use requires clinician guidance.
Interactions
- Alcohol, opioids, and sedatives can increase drowsiness and breathing risk.
- Medicines that prolong QT can increase abnormal heart rhythm risk.
- Blood-pressure medicines may increase dizziness or fainting.
- Anticholinergic medicines can worsen constipation, dry mouth, or urinary problems.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.