Adjunct Therapy: Wild Cherry • Petasites Compound is a general broad-spectrum formula designed to treat many types of coughs. However, the addition of certain other herbs to this compound can custom tailor it to fit a specific type of cough and thereby enhance the effectiveness of the treatment. If indicated, add one or two of the herbal extracts listed below to each dose of the compound: Sundew Extract (30 to 40 drops): dry, spasmodic or explosive coughs such as in whooping cough or measles; tickling coughs.