
Yerba santa is used for respiratory conditions including coughs, colds, tuberculosis, asthma, and chronic bronchitis. It is also used for fever and dry mouth. Some people use it to relieve muscle spasms, to loosen phlegm, and as a tonic. ... In foods and beverages, an extract of yerba santa is used as a flavouring . Used by smokers to help rid the lungs of tar.