Which herb is best for an acute cough with yellow phlegm and nausea?

• A. Zhu Ru
• B. Jie Geng
• C. Xing Ren
• D. Bai Jie Zi

Answer: (A)

When a patient presents with an acute cough accompanied by yellow phlegm and nausea, the goal is to clear heat and transform phlegm while also addressing the digestive upset that produces vomiting or nausea. Zhu Ru fits this combination well because it directly clears heat and resolves phlegm, and it is also known for stopping vomiting. The yellow phlegm signals phlegm-heat, which often contributes to coughing, and the nausea suggests heat in the stomach or a disturbance from phlegm rising. Zhu Ru’s dual action—reducing phlegm-heat in the body and calming the stomach—targets both symptoms simultaneously, making it a stronger fit than the other herbs listed, which mainly address cough or phlegm without the antiemetic effect.