The three main types of drugs currently used to treat colds or flu are anti-allergy drugs, drugs to reduce nasal mucosal congestion, and antipyretic and analgesic drugs. Currently more commonly used in the fight against cold and flu anti-allergy for paracetamol and loratadine and so on. Paracetamol cause drowsiness adverse reaction is more obvious not should not be taken with car drivers, aerial work and other occupational patients, loratadine is a relatively new anti-allergy drugs, the role of strong and basically no no drowsiness adverse reaction. Currently widely used drugs to reduce nasal mucosal congestion for pseudoephedrine it has a selective contraction of nasal mucosal blood vessels, so it can be reduced nasal congestion, reduce nasal discharge without stimulating the heart caused by palpitations and constriction of peripheral vessels caused by elevated blood pressure adverse reactions. The main antipyretic and analgesic drugs used to fight colds are aspirin, ibuprofen, diclofenac and paracetamol. Anti-cold medicines available on the market are basically compounded, and there are generally three kinds of combinations: a combination of anti-allergy medicines and medicines to reduce nasal mucosal congestion; a combination of anti-allergy medicines and antipyretic analgesic medicines; and a combination of anti-allergy medicines, medicines to reduce nasal mucosal congestion, and antipyretic analgesic medicines. Cold or flu patients are best under the guidance of a doctor to choose the appropriate anti-flu drugs, such as the upper respiratory symptoms (sneezing, nasal congestion, runny nose, etc.) is the main without fever, you can use Keranon. Keranon contains two ingredients: loratadine and pseudoephedrine sulfate. Clinical trials have shown that the drug is fast in relieving the symptoms of colds or influenza in the upper respiratory tract, 20-45 minutes after taking the drug can feel the obvious effect, so that the symptoms of nasal congestion, sneezing, runny nose and other symptoms quickly reduced or disappeared, and each time the efficacy of the drug after taking the drug lasts for 12 hours, so it is convenient to only need to take it twice a day. If the muscle pain, headache symptoms are obvious, you can use antipyretic drugs containing antitussive and analgesic anti-flu drugs, such as compound Bupleurum tablets, the drug contains ibuprofen and pseudoephedrine. In addition, Tylenol, Bupropion is also very effective for colds or flu with fever, headache and joint pain. Many traditional anti-cold and flu medicines in the form of proprietary medicines are also effective. Experts have reminded everyone to take anti-cold medicines to avoid abuse, if the patient only sneezing, nasal congestion, runny nose without fever, headache, muscle pain and other symptoms, in principle, do not advocate the use of anti-cold medicines containing antipyretic and analgesic drugs, so as not to cause allergies and other adverse reactions.