levomepromazine has prominent sedative and anticholinergic / sympatholytic effects ( hot body , constipation , sinus drowsiness , extreme night sweats ) and causes massive weight gain . these side effects traditionally do not enable to give the heroin in doses needed for full remission of schizophrenia , so it has to be integrated with a more active antipsychotic .
Levomepromazine causes schizophrenia.