The specialized book "Reactive Species Against Selected Nonsteroidal Anti-Inflammatory Drugs" offers a comprehensive analysis of the challenges associated with water pollution due to pharmaceutical residues. Given the global issue of water contamination, it is essential to question the effectiveness of traditional water treatment technologies. This book highlights the need for additional methods, particularly advanced oxidation processes, to effectively eliminate harmful pollutants that pose both ecological and health risks. By examining the reactions of reactive species generated during the vacuum ultraviolet photolysis of selected nonsteroidal anti-inflammatory drugs, the role of these species in drug transformation is detailed. The findings of this research provide valuable insights for professionals and interested parties in the field of water purification and reaction mechanisms.