European Commission Regulation (EU) 37/2010 of 22 December 2009. on pharmacologically active substances and their classification” is an important and relevant work created by the team of authors, which seeks to highlight the complex aspects of the regulation of pharmacological substances in the European Union. This regulation has become a fundamental document that defines the rules and standards concerning the use of active substances in veterinary medicine, making it indispensable for professionals in the field of pharmacy, veterinary medicine and agronomy. The book immerses the reader in the world of legislation governing pharmacological substances, and offers an in-depth analysis of its content. It addresses key aspects of the classification of active substances, their use and the effects on animal and human health. The authors explain in detail how this regulation affects the development of new drugs, as well as the safety and effectiveness of existing drugs. This makes the book especially useful for researchers, students, as well as practicing veterinarians and pharmacists seeking to be aware of the latest changes in legislation. The topics raised in the book cover not only legal aspects, but also ethical issues related to the use of pharmacological substances. The authors emphasize the importance of adhering to safety and quality standards, which is a key point in ensuring the health of not only animals, but also people who may be indirectly affected by the use of such substances. The book also addresses issues of sustainable development and ecology, making it relevant in the context of contemporary challenges facing society. The style of the authors is distinguished by clarity and accessibility, which allows even those who do not have deep knowledge in the field of legislation, to understand the basic provisions and principles laid down in the regulations. This makes the book not only a scientific work, but also a practical guide that can be used in everyday practice. The team of authors working on this book consists of experts in the field of pharmaceuticals and veterinary medicine, which adds additional value and credibility to the submitted materials. The book will be of interest not only to professionals, but also to students studying veterinary medicine, pharmaceutics and related disciplines. It will be an excellent addition to training materials and will help to better understand how legislation affects research and practical application of pharmacological substances. Readers interested in animal health, food safety, and ethics in medicine will find much useful information in this book. If you are looking for a source of knowledge about pharmacologically active substances and their classification, the "Regulation (EU) of the European Commission 37/2010" will be for you a real find. This book not only informs but also inspires further research and discussion, emphasizing the importance of adhering to high standards in veterinary medicine and pharmaceutics. Do not miss the opportunity to deepen your knowledge and expand your horizons in this important and relevant area!