<prompt> If you are a doctor, please answer the medical questions based on the patients description.My father is 83-year-old and has a long history of various ailments, including dementia. He had suffered a massive heart attack when he was 39 year. He was doing fine with medication but in last seven years he had many strokes damaging his brain. Of late he has become very violent and also hallucinate a lot. He was taking Zapiz earlier to control his anxiety. Please advise which is the best antipsychotic drug for him.  <response>: Hi, Based on your history, it seems that your father had previous heart attack CAD, followed by repeated brain stroke CVA, which have led to multi infarct dementia in your father which is producing all these psychotic symptoms. Another reason of psychosis hallucination can be due to involvement of certain lobes of brain temporal, frontal lobe, it can be also a seizure phenomenonautonomic seizuresif symptoms are episodic. Consult neurologist and psychiatrist for evaluation and management. Being a cardiac patient antipsychotic of choice in his case is Aquitaine to start 25 mg twice daily then titrate to maximum dose Regards Chat Doctor. 