Platycodon grandiflorum and Chrysanthemum-clearing away heat and removing fire, (Chrysanthemum: It has the effect of cooling and calming the nerves, treating headache, dizziness, hypertension, nervous headache and conjunctivitis. Platycodon grandiflorum: It can relieve phlegm and cough, and has the function of dispersing lung and expelling pus. Ophiopogon japonicus, Boat-fruited Sterculia-protecting the throat (Ophiopogon japonicus: nourishing yin and moistening the lungs, benefiting the stomach and promoting fluid production, clearing the heart and removing annoyance. Anti-experimental arrhythmia, increase coronary flow. Nourishing yin and promoting fluid production, moistening lung and clearing heart. Used for lung dryness and dry cough. Cough due to fatigue, thirst due to body fluid injury, vexation and insomnia, thirst due to internal heat, constipation due to intestinal dryness; Diphtheria pharynx. It can be used for treating lung dryness, dry cough, hematemesis, hemoptysis, lung flaccidity, lung carbuncle, fatigue, fever, thirst, body fluid injury, dry throat and constipation. Boat-fruited Sterculia: clearing away heat and moistening lung, relieving sore throat and detoxicating, moistening intestine and relaxing bowels. Boat-fruited Sterculia can contract blood vessels, improve mucosal inflammation and relieve spasmodic pain. ) Scrophularia: clearing heat and cooling blood, purging fire and detoxifying, nourishing yin and side effects: Chrysanthemum: Patients with hypertension can have multiple syndrome types according to TCM syndrome differentiation, and it is best to use chrysanthemum for those with yin deficiency and yang hyperactivity. Those who belong to deficiency of both yin and yang should not use cold chrysanthemum, but only drugs that tonify yang and kidney yin. Patients who treat this syndrome often use warm codonopsis pilosula, astragalus membranaceus and Eucommia ulmoides Oliv. Rehmannia glutinosa, etc. Then their blood pressure will return to normal. If chrysanthemum, Uncaria and Concha Haliotidis are used, the antihypertensive effect is not good. In addition, chrysanthemum is not suitable for patients with phlegm-dampness and blood stasis hypertension. Boat-fruited Sterculia: Not suitable for hoarseness caused by excessive alcohol and tobacco. For some people who suddenly lose their voice or have spleen deficiency, it can also cause sore throat. Do not make tea, because some patients may have allergic reactions, such as itchy skin and swollen lips. Drinking in large quantities for a long time may be life-threatening. Platycodon grandiflorum: stimulates gastric mucosa. Excessive use can cause mild nausea and even vomiting. Gastric and duodenal ulcers should be used with caution, and the dose should not be too large. Platycodon saponin has a strong hemolytic effect, so it is only suitable for oral administration, not for injection; After oral administration, platycodon grandiflorum saponin is hydrolyzed and destroyed in digestive tract, that is, there is no hemolysis. Scrophularia: Deficiency of the spleen and stomach, people who eat less loose stool should not take it. Anti-veratrum. Ophiopogon japonicus: allergic symptoms are nausea, vomiting, palpitation, irritability, erythema and itching. It is not suitable for diseases such as water dampness, cold dampness, phlegm turbidity and obvious qi deficiency caused by spleen deficiency and dereliction of duty. Improper use will produce wet phlegm, resulting in excessive phlegm, pale mouth, loss of appetite and other adverse reactions. I think, if you make tea in moderation, these herbs can protect your throat and clear away heat and fire.