A drug is typically manufactured through chemical synthesis, which means that it is made by combining specific chemical ingredients in an ordered process. Biologics are medicines made from living cells through highly complex manufacturing processes and must be handled and administered under carefully monitored conditions. Biologics are used to prevent, treat, diagnose, or cure a variety of diseases including cancer, chronic kidney disease, autoimmune disorders, and infectious diseases. A biosimilar is a biologic that is similar to another biologic drug already that has already been approved. This book is a complete guide to the use of biologics and biosimilars in the treatment of dermatologic disorders. Beginning with an overview of the history and classification of biologics and the concept of biosimilars, the following chapters explain their therapeutic use for different skin conditions. The final sections cover related topics such as cost effectiveness and quality of life with biologic therapy, and the book concludes with discussion on future developments and the use of small molecule treatment. This second edition has been fully updated to provide clinicians with the latest advances in the field. Previous edition (9789352703647) published in 2018.