Low-dose venlafaxine treatment in panic disorder.

Venlafaxine, a structurally novel antidepressant that combines mechanisms of action of both the cyclic antidepressants and SSRIs, may be effective in the treatment of panic disorder. Thirteen patients with DSM-IV panic disorder with or without agoraphobia participated in an open-label, fixed-flexible dose treatment study with venlafaxine. All patients who completed the 10-week trial exhibited statistically significant decreases in scores on anxiety symptoms as well as complete cessation of panic attacks at an effective mean daily dose of 47 mg per day. Venlafaxine was well tolerated in all completers. Venlafaxine may be an effective antipanic agent, even at lower than typical antidepressant dosages.