Compound Qing Dai capsule is a Chinese patent medicine often used in dermatology, its ingredients include Amaranthus, Qing Dai, Tu Fu Ling, Bai Moss Bark, Dan Shen, Dandelion and so on. It has the function of clearing heat and detoxifying, eliminating blemishes and stasis, dispelling wind and relieving itch, and is applied to diseases such as psoriasis, pityriasis rosea and drug rash. Common adverse reactions are mainly digestive system adverse reactions, there may be diarrhea, abdominal pain, nausea appear a high incidence of other things like skin allergies, the incidence of leukopenia in the blood system or dizziness, headache are extremely low.