The efficacy of Lianhua Qingdian Capsule can treat cold and flu. Lianhua Qingdian capsule belongs to the Chinese patent medicine, the main ingredients are sizzling ephedra, fried bitter almonds, forsythia, honeysuckle, gypsum, root of bluebells, fritillaries and so on, it has the effect of clearing the plague and detoxifying the toxin, promoting the lungs and cathartic heat and so on. And the treatment of influenza belongs to the evidence of heat and poison attacking the lungs, which is characterized by fever, malignant cold (fear of cold), nasal congestion and runny nose, cough, muscle pain, headache, dry throat and sore throat, and so on. Rash, itching, nausea, vomiting, abdominal pain, diarrhea, abdominal distension, regurgitation, dry mouth, dizziness and other adverse symptoms may occur after taking the product, and it is contraindicated for those who are allergic to the product and its ingredients. At the same time, during the use of drugs patients should avoid smoking, alcohol and spicy, cold, greasy food. The use of drugs should be carried out under the guidance of a professional physician, do not blindly use drugs on your own, so as not to cause adverse consequences.