Levofloxacin has adverse effects and indications like any other drug, and because of the disabling and potentially irreversible serious adverse effects that can occur with the use of levofloxacin, it is necessary to use levofloxacin with caution and to use this medication when the indications are met. Levofloxacin is a quinolone antimicrobial drug, the use of levofloxacin can be disabling and potentially irreversible serious adverse reactions, such as tendonitis, tendon rupture, arthralgia, myalgia, peripheral neuropathy, and central nervous system reactions such as hallucinations, anxiety, and may also exacerbate myasthenia gravis, making the QT interval on the electrocardiogram prolonged, and so need to be careful with the use of levofloxacin. In addition, the use of levofloxacin may also cause abdominal pain, diarrhea, nausea, vomiting, dizziness, headache, somnolence, insomnia, elevated serum aminotransferase, increased blood urea nitrogen, peripheral blood leukocytes, rash, conjunctivitis and other adverse reactions. The use of this drug is contraindicated in patients who are allergic to levofloxacin, in patients under 18 years of age, and in pregnant and lactating women. Levofloxacin is indicated for infections of the respiratory system, urinary system, digestive system, soft tissues of the skin caused by sensitive gram-negative and gram-positive bacteria, as well as urethritis and cervicitis caused by gonococcus and Chlamydia trachomatis. If you need to use Levofloxacin, please under the guidance of a physician, do not use on your own.