The efficacy of ergodein is due to the action of active metabolites. Thiol groups of metabolites cause disruption of disulfide bridges, which bind one to another glycoprotein fibers, which leads to a decrease in the elasticity and viscosity of phlegm. As a result, ergostein strengthens and accelerates the release of respiratory tracts from secretion, improves the secretory function of the epithelium and increases the efficiency of mucociliary transport in the upper and lower divisions of the respiratory tract.
Erdosteine has an antioxidant effect and carries free radicals. In particular ergostein protects the respiratory tract from the damaging effect of cigarette smoke with respect to the inactivation of alpha-1-antitrypsin.
Erdostein increases the concentration of immunoglobulin A (IgA) in the mucosa of the respiratory tract in patients with chronic obstructive airway disease, and also reduces the inhibitory effect of tobacco smoke on the function of granulocytes.
The effect of therapy with ergotosterin is developed on 3-4 days of treatment. Erdostein as such does not contain free SH-radicals, so it does not have a damaging effect on the gastrointestinal tract, and the side effects of the digestive system do not differ from the placebo effects.