Erdostein is a drug whose effectiveness is caused by the action of active metabolites. Thiol groups of metabolites cause disruption of disulfide bridges, which bind one to another glycoprotein fibers, this leads to a decrease in the elasticity and viscosity of phlegm. As a result, ergostein intensifies and accelerates the release of respiratory tracts from bronchial secretions, improves the secretory function of the epithelium and increases the effectiveness of mucociliary transport in the upper and lower parts of the respiratory tract.
Erdosteine topically, through amine groups, antagonistically acts on free radicals of oxygen and prevents the suppression of alpha-1-antitrypsin in tobacco-smoking, thereby reducing the damaging effect of tobacco smoke in chronic smokers.
Erdosteine increases concentration IgA in the mucosa of the respiratory tract in patients with chronic obstructive airways disease. The effect of therapy with the drug develops on 3-4 days of treatment. By itself ergostein does not contain free SH-radicals, therefore, it has virtually no effect on the gastrointestinal tract when taken at the recommended dose.