Hello Welcome to Health Care Magic. We understand your concern. I am Dr Alok Sinha, MD Psychiatry, from India. I will try to help you. Hyponatremia is known to cause a delirious state in a person leading to poor orientation about person, place and time, difficulty in focusing and shifting attention at will and altered sleep wake cycle. The person suddenly starts behaving strange, may claim that other may harm him/her or plotting against him/her. He/she may also hear strange voices, at the same time others may deny hearing the same. The person appears confused and puzzled, seems to be talking nonsense and often may shout or weep without obvious reason. In such situation it may be necessary to start a antipsychotic medicines for some time, as in your mother s case the doctor started Invega (Paliperidone) a well known antipsychotic medicine. If hyponatremia is corrected then these behavioural oddities get resolved spontaneously and the antipsychotic medicine may be stopped gradually. So, your doctors have rightly decided to stop antipsychotic medicine now. Sometimes antipsychotic drugs have their own side effects like tremors of hands and feet, rigidity of limbs, anxiety, inner restlessness, tendency to move always and inability to sit at a place (called akathisia ). Apparently your mother suffered this adverse effect. You may discuss these issues with her treating psychiatrist who may prescribe her few medicines like clonazepam and trihexyphenidyl for some days to relieve her symptoms. Hope this answers your question. I wish her all the best.