This book intends to open the debate between three main aspects of clinical practice: psychotherapy (including psychological and philosophical influences), neurobiology and pharmacology. These three main themes are clinically applied in what we call the "Intervention Triangle". The book will first focus on epistemologically distinct frameworks and gradually attempt to consider the integration of these three fundamental vertexes of practice. These vertexes are substantially unbalanced in the mental health field, and thus, this book tries to make sense of this phenomenon. Unique in its interdisciplinary and comprehensive view of mental health problems and approaches, this book offers a new perspective on unidisciplinary integration that previous publications have not considered. As an innovative contribution to its field, this volume will be particularly relevant to practitioners working towards integrative frameworks. It will also be of interest to students, clinicians and researchers, in particular, those working in psychology, medicine, psychiatry, philosophy, social work, and pharmacy.