Taking levofloxacin during breastfeeding can affect the child’s bone development, and should not be applied by breastfeeding women. Levofloxacin is a commonly used quinolone antimicrobial drug, commonly used in the treatment of bronchitis, urinary tract infections, prostatitis and other diseases, lactating women taking the drug treatment, the drug can be secreted through breast milk, under the action of levofloxacin, the child’s articular cartilage can be damaged, affecting the development of the skeleton, so lactating women should not apply the drug. In addition to Levofloxacin, there are many other drugs that should not be used by breastfeeding women, such as the use of tetracyclines, which can be secreted through breast milk to affect the development of the child’s teeth; such as the use of gentamicin, which can be secreted through breast milk to adversely affect the child’s hearing and kidney function. When breastfeeding women have the need to use drugs, they should use them under the guidance of a professional physician, so as to avoid improper use of drugs, leading to adverse consequences.