As long as levofloxacin is used in accordance with the doctor’s instructions, the chances of side effects are within control, patients do not have to be too worried about adverse reactions and refuse to use the drug, the side effects can be eliminated through reasonable use of medication and other ways. If abnormalities occur during the use of the drug, the drug should be immediately discontinued to seek medical attention. This product belongs to the quinolone class of antibacterial drugs, and its side effects mainly include gastrointestinal reactions, central nervous system reactions, allergic reactions and serious adverse reactions, etc. The details are as follows. 1. Gastrointestinal adverse reactions include abdominal discomfort, pain, diarrhea, nausea and vomiting. 2. Central nervous system adverse reactions include dizziness, drowsiness, insomnia, and in severe cases, seizures, mental abnormality, agitation, confusion, etc. 3. Allergic reactions include rash, pruritus, and angioneurotic edema. 4. Serious adverse reactions include: ① interstitial nephritis; ② shock, allergic symptoms; ③ toxic epidermal necrolysis; ④ acute renal insufficiency; ⑤ jaundice and so on. Levofloxacin is an antibiotic and needs to be used under medical supervision. As long as it is used in accordance with the doctor’s instructions, the chances of side effects are under control, and patients do not have to be too worried about the adverse effects and refuse to use the drug, and the side effects can be eliminated through rational use of medication and other ways. If abnormalities occur during the use of the drug, the drug should be stopped immediately and consult a doctor.