Can Plantago asiatica be consumed as a tea?
Generally, plantain herb can be consumed as an infusion, but it should be taken in moderation. Detailed explanations are as follows:

Plantain herb is a commonly used traditional Chinese herb known for its effects of clearing heat, promoting urination, improving vision, and relieving phlegm. Drinking an appropriate amount of plantain herb infusion may help alleviate symptoms caused by damp-heat, such as difficult urination, turbid discharge, edema, summerheat-dampness diarrhea, red and irritated eyes, visual obstructions, and phlegm-heat cough.
Although plantain herb offers various medicinal benefits, it should be consumed in moderation. Excessive intake may cause discomfort, such as diarrhea or other adverse reactions. Individual body constitutions vary, and responses to plantain herb may differ accordingly. Some people may be allergic to plantain herb or intolerant to certain components. Therefore, it's important to understand your own constitution and health status before consumption.
When preparing plantain herb infusion, clean plantain herb should be used and steeped in boiling water. The infusion time should not be too long to avoid affecting the taste and medicinal effectiveness. Pregnant women, nursing mothers, children, and individuals with weak constitutions should consult a doctor or pharmacist before consuming plantain herb infusion to ensure safety.