Saw an article in some scientific journal on ketamine for BPD, seemed promising. Think it was from Europe (Germany or Switzerland). Nasal ketamine spray for person with severe BPD, seemed to improve everything -- depression, anger outbursts, etc.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9156400/On the other hand, I thought I read an article suggesting BPD makes people a bit more disassociated already, so that made me think a dissociative like ketamine could exacerbate ...