The expectorant effect of the thoracic elixir is due to the action of its constituent components:
- licorice extract has a thick anti-inflammatory and expectorant properties that are associated with the content in the roots of glycyrrhizin,stimulating the activity of ciliated epithelium in the trachea and bronchi, and also enhancing the secretory function of the mucous membranes of the upper respiratory tract;
- anise oil has a bronchodilatory effect due to the oil content of anethole, which contributes to the reflex stimulation of breathing, increased activity ciliated epithelium of the airways and increased secretion of the mucous membranes of the larynx, trachea and bronchus;
- ammonia has an irritating effect that leads to the excitation of the endings of the sensory nerves of the upper respiratory tract and reflex stimulation of the respiratory center.