Medications are not prescribed to specifically treat Personality disorders but rather symptoms. Its possible a doctor might prescribe it for severe irritability and/or aggression if those are some of your symptoms and an SSRI is not enough. They aren't usually prescribed for depression since SSRIs or any of the other AD's out there are usually more effective. Antipsychotics have serious side effects like weight gain, elevated triglycerides and blood sugar so more doctors are trying to avoid prescribing them if psychosis is not present.