Coltsfoot combines a sothing expectorant effect with an anti-spasmodic action. There are useful levels of zinc in the leaves. This mineral has been shown to have marked anti-inflammatory effects. Coltsfoot may be used in chronic or acute bronchitis, irritating coughs, whooping coughs and asthma. Its soothing expectorant action gives Coltsfoot a role in most respiratory conditions, including the chronic states of emphysema. As a mild diuretic it has been used in cystitis. The fresh bruised leaves can be applied to boils, abscesses and suppurating ulcers. The New Holistic Herbal by David Hoffmann Pg. 192