Levomepromazine (methotrimeprazine) is an anti-psychotic used at low dose for the control of nausea and vomiting. When levomepromazine hydrochloride as Nozinans diluted with 0.9% sodium chloride at concentrations ranging from 0.13 to 6.25?mg/ml, and stored in polypropylene syringes, the drug is stable for at least 14 days.