Antimicrobial drugs refer to drugs that have inhibitory and killing effects on bacteria. Cold is one of the most common human diseases, and its main feature is that when people’s resistance decreases due to various reasons, especially under the stimulation of cold climate, there is nasal congestion, runny nose, sneezing, headache, body aches and other discomforts. Many friends around me, because of the eagerness to cure or do not understand the cause of the cold and cold medicine, a cold symptoms appear with cephalosporin, sarsen and other antibacterial drugs to take a gas, the results of the cold is not cured, the disease aggravated, but also caused by the side effects of taking antibacterial drugs. In fact, the flu is an upper respiratory tract infection caused by a virus, is a self-limiting disease, immune people can generally heal themselves in about a week. And antibacterial drugs are useless against the flu virus. Only when the cold is complicated by bacterial infection, the application of antibacterial drugs is considered. So, which are cold medicines? At present, there is a wide range of cold medicines on the market. The number of advertisements is also dazzling. However, the main components of various cold medicines are as follows, such as antipyretic and analgesic drugs, such as paracetamol, aspirin, diclofenac, etc.; antihistamines, such as paracetamol, dumbhailamine; mucosal vascular s drugs, such as pseudoephedrine hydrochloride; cough suppressants, such as dextromethorphan; antiviral drugs, such as virus, amantadine; and caffeine, artificial taurine, taurine, glucose Zinc gluconate, vitamin C and other drug combinations. As different trade names of cold medicines contain the same drug ingredients, care should be taken to avoid duplication of medication. Such as day and night pepcid, white plus black, Tylenol, silver Delfin, fast gram, Likshu and other cold medicines contain antipyretic analgesic paracetamol, Sanli pain, fast gram, etc. contain caffeine; white plus black, Tylenol, Likshu, etc. contain pseudoephedrine; cold punch, cold pass, Tylenol, fast gram, etc. all contain paracetamol, etc.. If the cold patient is eager to cure the disease, blindly combined application of the above cold medicine, certain drug components are bound to overlap, overdose and cause various toxic side effects.