The herbs in this formula are well established. They are prescribed in Germany for respiratory tract symptoms including coughs, asthma, wheezing, bronchitis, and some heart conditions. It relieves cramps in the bronchial tree and promotes increased expectoration, sweat production and respiratory detoxification.
According to the German Herbal Pharmacopia, the following herbs have been extensively researched and their efficacy related to conditions of the lung and bronchials is documented.