The textbook "Biofarmacevtika" offers a comprehensive analysis of rectal drug administration and its therapeutic advantages. It explains how rectal dosage forms can be the most effective method for drug delivery in certain cases. The authors, Tamara Nikolaevna Glizhova and Alexandr Alexandrovich Smirnov, highlight the rapid therapeutic effects that can be achieved through rectal application, as well as the benefits of avoiding gastric irritation and the rapid inactivation of active substances in the liver. The book is aimed at professionals and students in the field of pharmacology and medicine who seek a deeper understanding of the application and effects of biopharmaceuticals.