I take olanzapine, as well as an antidepressant. I haven't been diagnosed with BPD - but I have been diagnosed with the complex form of PTSD. Olanzapine was given to me originally as a temporary measure during a crisis, but I have found it works so well to help me regulate my emotions that I've been told to stay on it. What it does for me is lower my anxiety and makes me feel somewhat grounded. Not sure if this is the kind of information your after?