For drug allergy, Chinese medicine is called drug poison. Drug poisoning can be categorized into dampness and toxicity in the skin, heat and toxicity in the camp, and deficiency of qi and yin, and the representative prescriptions are Dioscorea villosa, Qingying Tang, Enriching Liquid Tang, and Yiqi Tang. Dampness-poison impregnated skin syndrome: erythema, blisters, or even vesicles oozing on the skin. The epidermis is peeling off; accompanied by severe itching, irritability, dry mouth, dry stools, yellow and red urine, etc., can be used with the addition and subtraction of Diospyroxylum and Dampness Enhancing Tang. Heat-poison and human camp evidence: bright red or purple-red skin lesions, or even purple spots and blood blisters; accompanied by high fever, confusion, dry mouth and lips, thirst, dry stools, and short and red urine (small amount of urine, dark yellow in color). Qingying Tang can be used to add and subtract. Qi and Yin deficiency: the skin lesions subside; accompanied by low fever, thirst, fatigue, shortness of breath, dry stools, yellow urine, etc., can be used to increase the fluid soup combined with Yi Stomach Soup plus or minus. If you are allergic to drugs, you should stop taking the drugs, go to the hospital in time, drink more boiled water and avoid spicy food.