Ciprofloxacin, also known as ciprofloxacin, ciprofloxacin, ciprofloxacin, ciproxin, mansulin, empula, temera, ciprofloxacin, belongs to the third generation of quinolone antibacterial drugs, It was successfully developed by Bayer Pharmaceuticals of Germany, and its trade name is "Xipule". It was first launched in the United States, Germany and Chile in 1987. It has become the most widely used fluoroquinolone antibiotic in the world, and its antibacterial spectrum is similar to that of norfloxacin. , But its antibacterial activity is 2-10 times stronger, and it is the drug with the strongest in vitro antibacterial activity in this class of drugs. It is significantly better than antibiotics such as cephalosporins and aminoglycosides against Enterobacter, Neisseria gonorrhoeae, Streptococcus Chemicalbook, Legionella, Staphylococcus aureus, etc. The antibacterial activity against Gram-positive bacteria is similar to that of Ofloxacin, and it is sensitive to all sensitive bacteria. The antibacterial activity of gram-negative bacteria is 2 to 4 times stronger than norfloxacin and ofloxacin, and is also better than cefaclor and gentamicin. Gentamicin-resistant Enterobacteriaceae and methicillin-resistant Staphylococcus aureus are often still sensitive to this product. The mechanism of action of ciprofloxacin is to inhibit DNA gyrase involved in nucleic acid synthesis, and to prevent cell division and sterilization by destroying the structure of bacterial DNA.