At present, the main drugs used to treat cold or flu are anti-allergic drugs, drugs to reduce congestion of nasal mucosa and antipyretic and analgesic drugs. At present, the anti-allergy drugs that are more commonly used to fight against colds are paracetamol and loratadine. Paracetamol causes drowsiness and is not suitable to be taken by car drivers, high-altitude workers and other occupational patients, while loratadine is a relatively new anti-allergy drug with strong effects and basically no drowsiness. At present, the widely used drug to reduce nasal mucosal congestion is pseudoephedrine, which has the effect of selective constriction of nasal mucosal blood vessels, so it can reduce nasal congestion, reduce clear nasal discharge without stimulating the heart causing palpitations and contraction of peripheral blood vessels causing blood pressure rise. The main antipyretic and analgesic drugs used as anti-cold are aspirin, ibuprofen, diclofenac and paracetamol. Commercially available anti-cold medications are basically compounded, and there are generally three kinds of cases: a combination of anti-allergic medication and nasal mucosal decongestant; a combination of anti-allergic medication and antipyretic analgesic; a combination of anti-allergic medication, nasal mucosal decongestant and antipyretic analgesic. Patients with cold or flu should preferably choose appropriate anti-cold medication under the guidance of a doctor, for example, if the symptoms of upper respiratory tract catarrh (sneezing, nasal congestion, runny nose, etc.) are predominant and there is no fever, then Karelix can be used. Kerenon contains two ingredients: loratadine and pseudoephedrine sulfate. Clinical experiments have shown that the effect of the drug on relieving the upper respiratory tract khat symptoms of cold or flu is fast, and the effect can be felt in 20-45 minutes after taking the drug, so that symptoms such as nasal congestion, sneezing and runny nose can be quickly reduced or disappeared, and the efficacy of the drug can last for 12 hours after each dose, so it is convenient to take the drug only twice a day. If the muscle pain and headache symptoms are obvious, you can use anti-cold medicine containing antipyretic and analgesic, such as compound Buhma tablets, which contains ibuprofen and pseudoephedrine. In addition, Tylenol, Benadryl is also very effective for cold or flu with fever, headache and joint pain. Many traditional anti-cold medicines are also effective in Chinese medicine. Experts remind us that taking anti-cold medicine should avoid abuse. If a patient only sneezes, has a stuffy nose and runny nose without fever, headache, muscle pain and other symptoms, in principle, it is not recommended to use anti-cold medicine containing antipyretic and analgesic drugs to avoid allergic and other adverse reactions.