"Psychotherapy and antidepressant for panic disorder"
This is a review of a variety of studies of the effectiveness of therapy and antidepressants in fighting panic disorder. From the review:

Overall, psychotherapy plus antidepressant was better than antidepressant or psychotherapy alone at the end of the treatment phase... At longer term follow up, psychotherapy plus antidepressant was better than antidepressant alone...but not psychotherapy alone.