I think medications for BPD are more symptom management (please correct me if I'm wrong). If you're excessively angry, you might get something for that. Or if you have issues with mood swings, you might get a mood stabilizer. Or if you have depression along with BPD, an antidepressant. I think there might be a medication that help with impulsivity, but I'm not sure there. As for me, I'm on a couple of antidepressants and I was offered something to temper my anger, but I declined that.