levomepromazine has prominent sedative and anticholinergic / sympatholytic symptoms ( sore mouth , hypotension , sinus tachycardia , extreme night sweats ) and causes enormous weight gain . these combined effects normally do not give to give the drug in doses needed for whole remission of schizophrenia , so it has to be combine with a more potent antipsychotic .
Levomepromazine causes schizophrenia.