Abstract
Calcium-hopantenate (HOPA), a derivative of GABA, was administered to 9 psychiatric patients with neuroleptics-induced tardive dyskinesia. In a clinical study, involuntary movements have improved significantly after a 4-8-week medication. Although there was no correlation between the cerebrospinal fluid (CSF) levels of HOPA, GABA, HVA or clinical response, the CSF HOPA levels significantly correlated with changes in the CSF GABA levels. These results suggest that HOPA alleviates the symptoms of tardive dyskinesia being mediated by the central GABAergic mechanisms.
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