There is no medication which can address the root cause of a panic disorder in order to eliminate it successfully. Some medication can alleviate some of the symptoms, however, this affect is superficial and temporary, not a curative panic attack treatment.
All drugs can do is sedate the mind in order to temporarily suppress some anxiety symptoms, they do not ever represent a curative solution.
Drug therapy can help to 'knock the edge off' the acute anxiety or panic attacks experienced but if you rely solely on these drugs to cure your panic disorder or to remove the underlying anxiety, you are making a big mistake.
As a panic attack treatment, drug therapy can not now, or ever reach the area of the brain responsible for the formation of panic attacks and successfully identify which neural pathways to 'prune' in order to prevent panic attacks... it's just not possible.