<unk> s are a class of chemical<unk> s that aid in the clearance of mucus or sputum from the upper and lower airways, including the lungs, bronchi, and trachea.<unk>  drugs include expectorants, mucolytics, mucoregulators, and mucokinetics. These medications are used in the treatment of respiratory diseases that are complicated by the oversecretion or inspissation of mucus. These drugs can be further categorized by their mechanism of action.
Mucoactive agent
Proton-pump inhibitor
Deodorant
Immunostimulant
Cholagogue
Prokinetic agent
Nonsteroidal anti-inflammatory drug
Aerosol-generating procedure