Yes, it is quite possible to have Borderline Personality Disorder and Bipolar Disorder at the same time. However, you may just be responding to your meds. The trick is to think back to before you were on the meds. Did you still display the symptoms then? I would talk to your doctor. He or she will be able to really help you think about it and diagnse you if need be. Good luck.
Co-Moderator, Bipolar Forum