The present invention is directed to (-)-(2R,3S)-2-amino-3-hydroxy-3-pyridin-4-yl-1-pyrrolidin-1-yl-propan-1-one (L)-(+) tartrate salt, a pharmaceutical composition comprising said salt, a process for making said salt, and the use of said salt in the treatment of pain.La présente invention concerne du (-)-(2R,3S)-2-amino-3-hydroxy-3-pyridin-4-yl-1-pyrrolidin-1-yl-propan-1-one (L)-(+) tartrate, une composition pharmaceutique comprenant ledit sel, un procédé de fabrication dudit sel, et L'utilisation de ce sel dans le traitement de la douleur.