In general, large-leafed Manchurian star has the effect of clearing heat and brightening the eyes, reducing cataracts and swelling. It has the effect of treating sore throat and conjunctivitis. The roots and stems can be used as medicinal herbs to relieve cough and resolve phlegm. But as a single herb has limited effect, usually used with other drugs. It can be used with other herbs to expel wind and clear away heat. It is also used in combination with other herbs to treat sore throats. When combined with herbs such as Taibai Tea and Taibai Huanglian, it can help treat conjunctivitis. In addition, patients are advised to go to the hospital for examination when they feel unwell, so as to clarify the cause of the disease and then deal with it accordingly under the guidance of the doctor. Do not self-medicate, so as not to delay the condition.