Yangyin Qingfei Decoction is composed of 6 grams of Radix Rehmanniae, 5 grams of Radix Ophiopogonis, 2 grams of Radix Glycyrrhizae, 5 grams of Radix Scrophulariae, 3 grams of Fritillaria, 3 grams of Cortex Moutan, 3 grams of Herba Menthae, 3 grams of parched Radix Paeoniae Alba. Functions: nourishing yin and clearing lung, detoxifying and relieving sore throat. Indications: diphtheria. The throat is as white as rot, which is not easy to wipe away. The throat is swollen and painful, with fever or no fever at first, dry nose and lips, cough or no cough, vocal breathing, like wheezing but not wheezing, and weak or thready pulse. In the prescription, the sweet and cold earth is reused to enter the kidney, nourishing yin and clearing lung; Scrophularia root nourishes yin, promotes fluid production, purges fire and detoxifies, * * * is the monarch drug Ophiopogon japonicus nourishing yin and clearing lung, Paeonia lactiflora tonifying yin, nourishing blood and clearing heat, Paeonia suffruticosa cooling blood and reducing swelling, and the three drugs are combined to help the monarch drug moisten dryness. Clearing heat and detoxicating is the minister medicine Fritillaria, which can clear heat and resolve phlegm, moisten lung and relieve cough; Mint clears throat, pungent and dispels epidemic toxin, and the two drugs are auxiliary drugs, namely raw licorice, which purges fire and detoxifies, and the drugs are blended, so that the drugs can be used together, and have the efficacy of nourishing yin and clearing lung, detoxifying and relieving sore throat. Compatibility features: Ziyin Qingre drugs are combined with pungent and cool and dispersing products, and both evil and positive are taken into account. Nourishing lung, nourishing yin and strengthening body resistance; The key points of the syndrome of relieving exterior syndrome, relieving sore throat, clearing away heat and toxic materials, and eliminating pathogenic factors: white throat is like rot, which is not easy to wipe away, sore throat, dry nose and lips, and pulse number are dialectical points.