Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. From the symptoms, it looks like your sister is suffering from schizophrenia. Illusions and hallucinations are part of it. Medication for schizophrenia is lethargic and she is bound to feel tired and gain weight. In the meanwhile, you should also check for thyroid complaints. The best course of action should be to continue treatment with a psychiatrist as well as with a clinical psychologist who can provide Cognitive Behavior Therapy (CBT). Both in tandem definitely shall be of help. If you require more of my help in this aspect, Please post a direct question to me in this website. Make sure that you include every minute details possible. I shall prescribe some CBT techniques which should help you cure your condition further. Hope this answers your query. Available for further clarifications. Good luck.