THIS INVENTION IS DIRECTED TO THE (S)-ENANTIOMER OF THE COMPOUND OF FORMULA (I) OR A PHARMACEUTICALLY ACCEPTABLE SOLVATE OR PRODRUG THEREOF. THIS (S)-ENANTIOMER IS USEFUL FOR THE TREATMENT OF DISEASES OR CONDITIONS, SUCH AS PAIN, WHICH ARE AMELIORATED OR ALLEVIATED BY THE MODULATION OF VOLTAGE-GATED SODIUM CHANNELS.