A demulcent (derived from the Latin: demulcere "caress"), sometimes called a mucoprotective agent, is a mucilaginous or oleaginous preparation[1] that forms a soothing protective film over a mucous membrane, relieving minor pain and inflammation of the membrane.[2][3][4] However, they generally help for less than 30 minutes.[5]
Demulcents are sometimes referred to as mucoprotective agents. Demulcents such as pectin, glycerin, honey, and syrup are common ingredients in cough mixtures and cough drops.[6]
Natural demulcents include slippery elm, pectin, licorice-root and marsh-mallow (Althaea officinalis).
Synthetic demulcents include methylcellulose, propylene glycol, and glycerin.
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