Expectorant effect on respiratory tract

The "expectorant effect on respiratory tract" refers to the capacity of a substance, typically a medication, to promote the expulsion of mucus from the airways, bronchi, and lungs. This effect is mediated by various mechanisms, such as increasing the water content of mucus to make it less viscous, stimulating respiratory fluid secretion, or acting reflexively via the vagal pathway to recruit secretion of less viscous mucus. Common medicinal agents that elicit an expectorant effect include guaifenesin, bromhexine, ambroxol, hypertonic saline, and various herbal preparations. This term is not a molecular target and does not designate a specific biochemical receptor, enzyme, channel, or protein.

Other names

expectorant effectexpectorant actionmucokinetic effectmucus clearance effect

Increases the water content of mucus, reducing viscosity. Stimulates respiratory tract fluid secretion. Irritates gastric vagal receptors to induce glandular exocytosis in the airways. Facilitates mucociliary clearance or productive cough.