Because she had a psychotic episode following a horrible accident where her entire arm and parts of her side and breast were burned. During the episode she had auditory and visual hallucinations and thought that people (including myself and my family) wanted to kill her. She spent two weeks in a psychiatric ward before they said she could go home. She was prescribed a bunch of different stuff for a while but now has only been taking a very low dose of Seroquel once per night. She has continued having some psychotic symptoms since...mainly thinking that she is unsafe in perfectly normal conditions and believing that strange patterns exist with numbers she sees. At times she thought that people close to her were vampires.
The Seroquel seemed to help but now her behavior has become increasingly strange. She is now acting like a rebellious adolescent and she has stopped taking the Seroquel (which I think is worsening the symptoms). She is lying to everyone about everything. She claims she can't find the Seroquel but we believe she threw it away. She cut off a lot of her hair and then biked around town with very revealing clothing on. She told my mom she was doing this on purpose to make her upset and chase her and try to get her to stop. Her behavior has become so erratic that we are unsure what to even do with her, and we are not getting much guidance from her psychologist. She hasn't slept in days now (which was a big problem for her after the accident) and she often disappears...walking around aimlessly for hours or driving around in her car aimlessly for hours.
I personally think that the accident exacerbated problems in the past that she had - before the accident she was behaving strangely and we later found out that she was very depressed during this time in her life. She mostly had problems with forming normal, adult relationships with boys and often acted like a kid when in her late 20s. She was very hurt by a lot of breakups she had by boys in the past as well as friends who turned out to not be very good friends at all.
Anyway, does anyone have any advice for what we can do regarding dealing with her? We are trying to stop giving her the attention she craves but we worry that she may do something really bad (possibly even harmful) to get attention. We just want her to get to the point where she has a happy, healthy life and healthy relationships with others. Now, due to her behavior, she is forcing the people who care about her most to start distancing themselves from her.
TL;DR: My sister was diagnosed with PTSD. She is refusing to take her medication and is getting worse. Looking for any advice you can give.