Since the introduction of antibiotics, countless lives have been saved, and their effectiveness, convenience and cheapness have been widely accepted, until today antibiotics have become a necessary medicine for almost every family. However, many people have many misconceptions about antibiotics and their usage in practice, and these misconceptions often lead to incorrect medication, which causes a series of problems. In this article, the common misconceptions are listed below to draw the attention of readers. A. “Antibiotics can be used to prevent infections”. The antibiotics are mainly used to kill or inhibit the bacteria, can not enhance the body’s resistance, how to prevent infection said. Of course, antibiotics can be used clinically to prevent bacterial infections, but this concept is different from preventing infections, such as the need to take antibiotics to kill most of the bacteria in the intestinal tract before intestinal surgery to prevent infection of other tissues during surgery. Moreover, antibiotics do not kill or inhibit viruses, while many infectious diseases in daily life are associated with viruses, so they are even less likely to prevent infections. On the contrary, the frequent use of antibiotics to prevent infection may delay the disease and also promote bacterial resistance. Second, “antibiotics are anti-inflammatory drugs”. Inflammation is a reaction to damage to the body’s tissues, manifested by redness, swelling, fever, and pain. Allergies, burns, scalds, frostbite and microbial infections such as bacteria, fungi and viruses can cause inflammation. What we usually call antibiotics “anti-inflammatory” is not really anti-inflammatory, it is not for the inflammation itself, it is mainly indirectly anti-inflammatory effect by fighting bacteria. The use of antibiotics for inflammatory conditions not caused by bacterial infections is likely to kill the beneficial bacterial groups in the body, causing a dysfunctional relationship between the flora and fauna, affecting the absorption of many nutrients and causing a decrease in resistance. The actual antibiotics are not suitable for the treatment of inflammation caused by bacteria in daily life. Third, “it is best to use broad-spectrum antibiotics”. Now due to the application of the network, many people know that antibiotics are divided into two categories: broad-spectrum antibiotics and narrow-spectrum antibiotics, mainly based on the scope of the fight against bacteria to divide the broad-spectrum antibacterial variety, narrow-spectrum antibacterial variety less, therefore, many people will take for granted to choose broad-spectrum antibiotics. In fact, broad-spectrum antibiotics can be interpreted as a universal essential oil, with a wide antibacterial range but no one expertise, while narrow-spectrum antibiotics are experts in killing a certain type or types of bacteria. The actual fact is that you can use broad-spectrum antibiotics when there is no clear pathogenic bacteria or when there is already a clear multiple bacterial infection. Fourth, “must use a good antibiotic”. The best way to get rid of the disease is to use the best medicine. The answer to what is a good antibiotic, without much thought, is a new antibiotic, a more expensive antibiotic. The newer antibiotics are indeed a great improvement over the older generation of antibiotics in terms of antibacterial range and strength, but we need to be conscious of the fact that the renewal of antibiotics is often driven by bacterial resistance, which means that new drugs are often created to solve the problem of drug resistance, rather than to enhance efficacy. If resistance is not taken into account, each antibiotic actually has its own advantages and disadvantages. For example, the old antibiotic erythromycin is inexpensive and effective for pneumonia caused by Legionella and mycoplasma infections, while the expensive Tylenol is not as effective as erythromycin in this regard. The actual antibiotics should be “only the right one, not the expensive one”. The best way to use antibiotics is to use a multi-pronged approach. The actual antibiotics are usually mixed with a variety of antibiotics, especially when the antibiotics are used for a period of time and the effect is not obvious. The most important thing to remember is that a mixture of antibiotics will not only enhance the antibacterial effect, but will sometimes be counterproductive, such as penicillin and cephalosporin antibiotics should not be combined with tetracycline and chloramphenicol. Some antibiotics can indeed strengthen the antibacterial effect, but also strengthen the toxic side effects, more harm than good, such as some cephalosporin antibiotics and streptomycin, vancomycin and other combined use will aggravate the damage to kidney function. Sixth, “cold medicine must be combined with antibiotics”. In general, most colds are caused by viruses, and only a few are caused by bacteria, so there is no mandatory joint use of cold medicine and antibiotics. Seven, “when you get well, you don’t need antibiotics”. This view is simply too common. This is because people are not clear about the process of bacterial pathogenesis. We must realize that bacteria in the human body must have two basic conditions to cause disease, one is the ability to cause disease, and the other is the number of bacteria. Antibiotics mainly change these two conditions, on the one hand, they change the structure or function of bacteria to reduce the ability to cause disease, on the other hand, they kill bacteria or inhibit bacteria from reproducing and control the number of bacteria until they are eliminated. In the process of disease development, when the antibiotics make the number of bacteria less and less, the disease is slowly improving, if you stop the drug at this time, the bacteria will have the opportunity to rest and recuperate, until the number grows to a certain amount again will be a comeback, people are caught off guard. The above are common misconceptions about the use of antibiotics, and I hope that readers will learn from this and be inspired to help them get out of these misconceptions early and use antibiotics clearly and live healthily.