Woods' has been a trusted Cough Syrup specialist and leading provider for Expel Phlegm Fast and Relieving Cough for more than 100 years since its first introduced in 1905. Woods' Peppermint Cough Syrups contains the active ingredient of Guaiphenesin. This ingredient acts against thick mucus by thinning the phlegm structure that clings to your air passage walls. Wood's brand has been committed to provide consumers with safe cough remedies whenever it is needed. The Peppermint Cough Syrup thins bronchial secretions to rid bronchial passageways of mucus and make the cough more productive.