The present invention is aimed at a novel composition for use as a medicament; it is also aimed at said composition for use in the treatment of depressive and anxiety syndromes. In particular, said composition is for use in the treatment of: major depression, generalized anxiety disorder, social phobia, panic disorder, mixed depression and anxiety disorder, somatoform disorder, treatment-resistant depression, obsessive-compulsive disorder. The invention also relates to a process for the preparation of said pharmaceutical composition.