Final answer:
Borderline Personality Disorder (BPD) is the most treatable Dramatic/Erratic personality disorder with empirically based treatments available, particularly dialectical behavior therapy (DBT).
Step-by-step explanation:
The most treatable Dramatic/Erratic personality disorder with empirically based treatments available is Borderline Personality Disorder (BPD).
Treatments for BPD typically involve a combination of psychotherapy and medication. One of the most effective forms of psychotherapy for BPD is dialectical behavior therapy (DBT), which focuses on developing skills for emotion regulation, distress tolerance, and interpersonal effectiveness.
Research studies have shown that DBT can significantly reduce symptoms and improve overall functioning in individuals with BPD. The effectiveness of DBT is supported by empirical evidence and has become the gold standard treatment for BPD.