I need practical ways I can help my sister who went off her medication and is now deep into her delusions. She is living on her own but very volitile with family and neighbors and generally anyone who mentions that she needs to get back on her meds. She believes she is the heiress of European wealth or royalty and that I have stolen her inheritance. She throws her personal items, like toilet paper away then demands that I give her money for more or bring her some more right away. She believes me to be a step-sister. Being at her beck and call has not helped and now I am trying to bring her back to reality by reminding her who her parents really were. However, I just read that I shouldn't be arguing with her delusions. She causes a ruckess at her apartment complex with her screaming and stomping. Fortunately, the manager now keeps me aware of any new behavior that comes up. The police has been called on her several times but nothing can be done to get her into mental health until she harms herself or someone else. My next step is to see if her GP will have his office call her for an annual check up and maybe he can talk her into taking her meds or be able to some how get her into Mental Health. We are both now in our 50s and this in the 3rd or 4th time since the disease first manifested itself in her early 20s that she has gone off her medication and sunk into a delusional state. The last time she was on the streets for weeks before the police could clearly take her in as a harm to herself. It's terrible to see this happening again and feeling like I have no control over helping her avoid what's coming if she does not get back on her meds. She is very stubborn and belligerent with anyone who does not do as she says or asks her if she is taking her medication. She has told me that the only medication that she is on is for diabetes and anorexia nervosa (neither of which she has ever been diagnosed with.) She has never, even on her medication, admitted that she has a mental disease and generally tells people she suffers from depression. Any ideas on what I can do to help stablize her again?