Lianhua Qingfei Capsules are used to clear the plague and detoxify the lungs and expel heat. Since most of the main ingredients in Lianhua Qingfei Capsules are Chinese herbs and most of them are cooling in nature, if patients take Lianhua Qingfei Capsules for a long time and in large quantities, it may cause side effects such as diarrhea and spleen and stomach yang deficiency. The damage to the gastrointestinal system caused by Lianhua Qingfei Capsule is mainly manifested by nausea, vomiting, gastrointestinal discomfort, bloating, diarrhea, digestive tract reactions, abdominal discomfort, decreased appetite, stomach pain, etc., and mainly occurs about 30 minutes after the medicine, and is more obvious when taking the medicine on an empty stomach. In addition, skin allergic reactions such as rash and allergic dermatitis involving Lianhua Qingfei Capsules are also common, and allergic reactions have been reported in this group of prescriptions containing fishy grass, bitter almond, menthol and other herbs or their preparations. In order to avoid the side effects of Lianhua Qingfei Capsules, the following points should be noted: 1. Patients must follow medical advice when taking the drug and must not overdose, and can stop taking the drug once the disease has healed. 2. If there are no obvious symptoms of a hot cold or viral flu, this drug should not be used for treatment. 3. Patients with high blood pressure and heart disease should use caution; those with serious chronic diseases such as liver disease, diabetes and kidney disease should take it under the guidance of a physician; children Pregnant women, nursing mothers, the elderly and weak, and those with spleen deficiency and loose stools should be taken under the guidance of a physician.