COMPOSITIONS À BASE D'UN AGONISTE DU RÉCEPTEUR AUX OPIACÉS DELTA / ANTAGONISTE DU RÉCEPTEUR AUX OPIACÉS MU, ET PROCÉDÉS DE TRAITEMENT DE LA MALADIE DE PARKINSON
or a pharmaceutically effective salt or ester thereof alone or in combination with L-DOPA to provide a synergistic effect, thereby providing methods of (1) treating patients with Parkinson's Disease for whom L-DOPA is no longer effective, (2) treating patients with Parkinson's Disease who developed dyskinesia due to L-DOPA, (3) treating patients with Parkinson's Disease who have are receiving deep brain stimulation and (4) treating patients with Parkinson's Disease whose symptoms interfere with activities of daily living.