In this case report we describe the therapy followed with a patient affected by atypical anorexia purging, in a setting that includes both psychotherapy and psychopharmacological treatment. The aim of this presentation is to show how the patient's ambivalence towards the treatment was faced, and how this work both rendered effective the pharmacological therapy and enabled the progression of the psychotherapy. There is a discussion of the interaction between psychotherapy and pharmacological therapy and their possible beneficial action on the symptomatology.