Akathisia is a side effect from dopamine-blocking meds (and occasionally from other meds). The confusing thing here is that I have never heard of a case of akathisia that continued after the medication is discontinued. There is some confusion with akathisia in that some people confuse it with tardive dyskinesia, a long-term, even permanent movement disorder that comes from dopamine blocking medications generally after long-term use. But akathisia is in a different category of side effects; it is usuallly a problem during the early use of a med and it goes away quickly after stopping the med.
I have to wonder, therefore, if you are truly having akathisia of whether something else is going on. There is a common pattern with Xanax that always causes problems-- the person takes it, feels relaxed, then as it wears off the anxiety returns. The anxiety at this point is 'rebound anxiety', a form of withdrawal, but the person thinks it is the anxiety 'disorder'... the dynamic leads to more and more use of Xanax or other benzos. Then you have the tolerance that occurs very fast, as well.
Akathisia sometimes responds to beta blockers. Clonazepam has less of the rebound effects since it has such a long half life;; you can dose it twice per day, or even once every night-- the half life of 24 hours means it will hang around the entire next day to help keep the anxiety at bay. As for the akathisia, it has been caused by prozac and a host of other meds; make certain you are not still contributing to the condition with other medications, and try some inderal throughout the day to reduce the symptoms if you have them.
JJ.