1. It can induce diuresis, relieve diarrhea, clear liver, improve eyesight, clear lung and eliminate phlegm. It can be used for dysuria, edema and gonorrhea, because it can soothe the cold, promote diuresis and clear heat, and is a common drug for treating edema and gonorrhea.

2. It can be used for diarrhea due to summer dampness, that is, in summer days, due to diarrhea caused by excessive summer pathogenic factors and excessive moisture, Plantago seed can promote diuresis, clear turbidity and stop diarrhea.

3. It is used for cataract and dim vision, that is, it can clear the liver and improve eyesight, can be used for liver heat, red eyes, swelling and pain, and can also be mixed with other drugs for cataract and liver and kidney yin deficiency.

4. It is used for lung heat and cough with excessive phlegm, because it has the function of clearing away lung heat and resolving phlegm, and can be used together with some other drugs for clearing lung heat and resolving phlegm.