Licorice root, known as Gan Cao, is valued for tonifying Qi, soothing the Lung and throat, easing cough, moderating spasms, and harmonizing the actions of other herbs.
Pinellia ternata, known in Vietnamese as Bán hạ bắc, is used for cough with much phlegm, chest or abdominal fullness, nausea, vomiting, and phlegm-dampness.