The most common cause of fever these days is influenza virus infection, which can cause respiratory infections, especially in the northern part of the country where the air is relatively dry. Coughing and coughing are often serious, and fever is also serious, accompanied by general muscle aches and pains, and high fever is more common, which must be treated with antiviral drugs. For influenza virus, the effect of ordinary antiviral drugs is often not enough, and treatment with oseltamivir, or Tamiflu as it is usually called, is needed, which has a better antiviral effect. However, Tamiflu has a certain stimulating effect on the stomach mucosa, so it must be taken after meals, not on an empty stomach. In addition, for the symptoms of fever also need to use antipyretic drugs, especially when the temperature is greater than 38.5 degrees, it is recommended to use ibuprofen suspension oral antipyretic. In addition, it is also necessary to use cough and phlegm medicines, the more effective ones are pulmonary cough combination or aminoglutethimide oral solution.