Question about Zofran

Since I have been on the Zofran it appears the dystonic movements have worsened. I am not on any other medication that can do this. I did look this up on the web and it came up on the medication website as well as a potential side effect. I know that Zofran is not primarily used to treat tardive dystonia so it might have any effect and some anti-Parkinson's treatments can cause movement disorders of their own. I have been tentatively diagnosed by my neurologist with having some form of dystonia as a child although it was not diagnosed at the time and it appears people with dystonia had a problem with this but the discussion site may or may not have been medically valid.  Is this a common side effect of Zofran? Or rare? Would it occur less at a lower dosage? And I would assume that Zofran would not potentially worsen tardive dyskinesia in any manner? I know its been of great benefit to me but it also appears to have worsened some aspects of the movement disorder so I'm trying to figure out how to manage it. I know my neurologist would make the final decision but its new to many practitioners so any general comments about this would be appreciated as they would be of help as has been the Zofran. Thanks.