The antiviral effect of interferon alfa-2b is manifested during the reproduction of the virus by active incorporation into the metabolic processes of the cells. Interferon, interacting with specific receptors on the surface of cells, initiates a number of intracellular changes, including the synthesis of specific cytokines and enzymes (2-5-adenylate synthetase and protein kinase), the action of which inhibits the formation of viral protein and viral ribonucleic acid in the cell.
The immunomodulatory effect of interferon alfa-2b is manifested in an increase in phagocytic activity of macrophages, enhancement of specific cytotoxic action of lymphocytes on target cells, changes in the quantitative and qualitative composition of secreted cytokines; changes in the functional activity of immunocompetent cells; changes in the production and secretion of intracellular proteins.