WHO Anatomical Therapeutic Chemical Classification

ATC/DDD Index是世界卫生组织(WHO)的解剖学治疗学及化学分类系统(Anatomical Therapeutic Chemical Classification)数据库，提供完整的ATC代码和限定日剂量(DDD)信息。该数据库由WHO药物统计方法整合中心(WHO Collaborating Centre for Drug Statistics Methodology)维护，是药品分类和药物使用统计的国际标准。数据库包含所有ATC层级的 searchable 信息，并提供ATC分类和DDD分配的指导原则。The ATC/DDD Index is a database of the World Health Organization (WHO) Anatomical Therapeutic Chemical (ATC) Classification System, providing complete ATC codes and Defined Daily Dose (DDD) information. Maintained by the WHO Collaborating Centre for Drug Statistics Methodology, it serves as an international standard for pharmaceutical classification and drug use statistics. The database contains searchable information across all ATC levels, and provides guidelines for ATC classification and DDD assignment.