Colds are usually caused by viral infections and amoxicillin is not usually recommended. Colds are mostly caused by viral infections, which clinically manifest as fever, cough, runny nose, nasal congestion, sore throat and other symptoms. Amoxicillin belongs to the anti-bacterial drugs and is not effective against viruses, so after a cold, amoxicillin is generally not used. Amoxicillin may be needed only if the patient has a clear combination of bacterial infection. And Amoxicillin needs to be careful to assess whether there is a history of allergy before use, and it is forbidden to be taken by allergic patients. In addition, patients with cold and flu should drink plenty of water in daily life, and pay attention to rest, prohibit spicy and stimulating food, also need to avoid smoking and alcohol stimulation. Please use the medication under the guidance of a physician, not blindly.