A traditional herbal remedy for the symptomatic relief of coughs This popular mixture from Potter's contains 8 natural active ingredients to relieve all types of Winter coughs & colds. Each individual herb has a slightly different action but together they combine to form one of the most effective herbal cough medicines on the market. While the main active ingredients (black cohosh, ipecacuanha, pleurisy root, elecampane, horehound, hyssop & lobelia) act as an expectorant by stimulating coughing & helping to remove phlegm, black cohosh & skullcap are included to help reduce coughing spasms.