A demulcent (derived from the Latin demulcere, "caress")'s an agent that forms a soothing film over a mucous membrane, relieving minor pain and inflammation of the membrane. Demulcents such as pectin, glycerin, honey and syrup are common ingredients in cough mixtures. These demulcents will coat the throat and relieve the irritation causing the cough. They can be used to treat any type of cough, but are particularly useful to treat dry coughs. Some demulcents may not be suitable for diabetics as… (More on Demulcent)