I had asked for some further information, but have not yet received a reply.
There are several medicines that can be considered that are not on the list of drugs that you listed in your question.
Buspirone is a medicine that is used for chronic anxiety that works by a unique mechanism, so would be reasonable to try. The SSRIs (such as the Celexa) have become the first line medicines, and have largely replaced the use of buspirone, but if the SSRIs cannot be tolerated or are ineffective, trying the buspirone would be reasonable.
It also would be reasonable to try an antidepressant / anti-anxiety medicine that works by affecting different chemicals in the brain, such as mirtazapine.
It also would be appropriate to consider non-medicinal interventions for treatment for the anxiety and panic disorder. The intervention that is most studied and has had the greatest success is cognitive-behavioral therapy (or CBT).
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