Book excerpt: This updated, third edition of the Handbook of Medicine in Psychiatry has been streamlined to provide a pragmatic approach to the realities confronting clinicians in today's busy inpatient and outpatient psychiatric settings. Each chapter features one or more clinical vignettes that illustrate the complexity of the presentation of abnormal vital signs and somatic disorders in psychiatric settings. This volume also provides risk stratification for major complications, enabling clinicians to determine the need to transfer the patient to an emergency medicine setting. A brand-new section features thorough discussions of topics requiring interdisciplinary collaboration with geriatricians, neurologists, anesthesiologists, and addiction medicine and adolescent medicine specialists. With the contributions of dozens of experts in their fields, the Handbook of Medicine in Psychiatry offers readers a cognitive framework and knowledge base that will assist them in accurate decision making in the conditions of uncertainty created by potentially major medical deteriorations of the vulnerable populations under their care.