An essential, comprehensive, and practical guide to understanding, measuring, and modifying patients  adherence behavior to optimize treatment outcomes, this book covers all major aspects of adherence in dermatology. The first section describes current knowledge on the magnitude and impact of nonadherence; the second outlines measuring adherence in the context of databases, trials and practice. The third section addresses adherence in key skin diseases and the fourth covers numerous strategies to improve adherence by mitigating specific patient barriers. All sections emphasize ways to optimize communication with patients: the foundation for producing successful health behavior change.Low adherence helps explain why, despite effective treatments existing for all major dermatologic conditions, many patients still fail to improve. When clinicians endeavour to maximize adherence, with the aid of evidence-based strategies, these drugs will often realise their potential.