My bipolar medication helps a ton with anger and agitation. I have both bipolar disorder and BPD traits. I'm currently on Zyprexa 10mg as-needed, and I've gone from spending hours daily so angry I was getting homicidal ideation (no meds), to only experience slight disgruntlement when things go amiss, but being able to deal with it and move on quickly. Don't rule out meds if you haven't tried them, they can work tiny miracles for some people.