The present invention provides a chromone oxime derivative of formula (I), which is a modulator of nervous system receptors sensitive to the neuroexcitatory amino acid glutamate and presents an advantageously high brain exposure upon oral administration, for the treatment or prevention of levodopa-induced dyskinesia. The present invention also provides an improved therapy of Parkinson's disease, using the chromone oxime derivative of formula (I) in combination with ievodopa.
