Ambroxol is a benzylamine - a metabolite of bromhexine. It differs from bromhexine by the absence of a methyl group and by the presence of a hydroxyl group in the para-trans position of the cyclohexyl ring. Has a secreto-motor, secretolitic and expectorant action.
Pre-clinical studies have shown that ambroxol stimulates serous cells of the glands of the bronchial mucosa. Activating cells of the ciliated epithelium and reducing the viscosity of sputum improves mucociliary transport.
Ambroxol activates the formation of a surfactant, having a direct effect on alveolar pneumocytes of type 2 and Clara cells of small airways.
Research on cell cultures and research in vivo on animals have shown that ambroxol stimulates the formation and secretion of a substance (surfactant), active on the surface of the alveoli and bronchi of the embryo and adult.
Also, in preclinical studies, the antioxidant effect of ambroxol was demonstrated. Ambroxol when combined with antibiotics amoxycycline, cefuroxime, erythromycin and doxycycline increases their concentration in sputum and bronchial secretion.