This invention relates to the new use of the compound 2-(R)-(4-Fluoro-2-methyl-phenyl)-4- (S)-((8aS)-6-oxo-hexahydro-pyrrolo[1,2-a]-pyrazin-2-yl)-piperid ine-1-carboxylic acid [1-(R)-(3,5-bis-trifluoromethyl-phenyl)-ethyl]-methylamideor pharmaceutically acceptable salts thereof and pharmaceutical compositions containing it for the treatment of chronic cough, particularly chronic cough due or associated with interstitial lung diseases (IDLs), including idiopathic pulmonary fibrosis (IPF), with lung tumours or with chronic obstructive pulmonary disease (COPD).Esta invención se refiere al nuevo uso del compuesto ácido 2-(R)-(4-Fluoro-2-metil-fenil)-4-(S)-((8aS)-6-oxo-hexahidro-pirro lo[1,2-a]-pirazin-2-iI)-piperidina-1-carboxílico [1-(R)-(3,5-bis-trifluorometil-fenil)-etil]-metilamida o sales farmacéuticamente aceptables de los mismos y composiciones farmacéuticas que lo contienen para el tratamiento de la tos crónica, especialmente la tos crónica debida o asociada a enfermedades pulmonares intersticiales (IDL), incluida la fibrosis pulmonar idiopática (FPI), con tumores pulmonares o con enfermedad pulmonar obstructiva crónica (EPOC).
