Erdostein belongs to the well-known thiol mucoactive drugs, whose effect is used in respiratory infections. Recently, expert findings show that the effect of erdosteine is more complex and can significantly contribute to the management of respiratory infections. Its antioxidant and anti-inflammatory properties come to the fore, or antiviral properties associated with them, as well as the ability to reduce bacterial adhesion and increase the effects of some antibiotics. Erdostein represents a comprehensive therapeutic option both in the field of self-treatment of respiratory infections and in other respiratory diseases.