Ambroxol is a metabolite of bromhexine. It possesses mucokinetic (improvement in mucus transport) and
secretolytic (liquefies secretions) properties. Ambroxol stimulates the serous cells of the glands of the mucous membrane of bronchi, increasing the content of mucus secretion. The mucolytic effect is associated with depolymerization and splitting of mucoproteins and mucopolysaccharide fibres, which leads to reduction in the viscosity & expectoration of mucus and breathing is eased considerably.

Ambroxol also stimulates the production of phospholipids of surfactant by alveolar cells and it has anti-inflammatory properties. In patients with COPD, it improves airway patency. Beside these, Ambroxol also exhibits anti-oxidant activity and long-term use is possible because of the good tolerability of the preparation.