Medicinal science is a branch of medicine that studies drugs - substances and medicines of various chemical structures and meanings, which are products of the vital activity of plant, animal or synthetic origin, as well as those created by genetic engineering and biotechnology, the use of which increases or normalizes the functioning of organisms. With the advent of microbiology, the focus of L.'s attention is on obtaining medicines of microbiological origin. Within its framework, various groups of antibacterial drugs are studied (for example, sulfonamides, nitrofurans, fluoroquinolones, cytostatics and antitumor antibiotics), drugs for the creation of specific immunotherapy for a number of diseases of infectious and non-infectious etiology (antibacterial serums, toxoids, vaccines, gammaglobulins). One of the promising groups of medicinal substances are plasmaphages (human antibodies), capable of lysing microbial cells. Research is also being conducted in the field of the medical use of antibodies, chemically modified carriers in combination with drugs, protein cocktails and hormonal drugs. A significant contribution to medicine was the development of biology and chemotherapy of malignant neoplasms with chemotherapy drugs and antibiotics. New L. methods, developed at the molecular level, make it possible to identify specific