Gastrointestinal reactions, central nervous system reactions, allergic reactions and other common side effects may occur after taking of ofloxacin tablets, as well as some less common side effects. 1. Gastrointestinal reactions: Gastrointestinal reactions may occur after taking of ofloxacin tablets. Gastrointestinal reactions include abdominal discomfort or pain, diarrhea, nausea or vomiting. 2. Central nervous system reactions: Central nervous system reactions such as dizziness, headache, drowsiness or insomnia may occur. 3. Allergic reactions: The most common symptoms are rash, itchy skin, etc. Occasionally, exudative polymorphic erythema and angioneurotic edema may occur. Photosensitivity reactions are less common. 4. Less common: may lead to symptoms such as seizures, mental abnormality, agitation, confusion, hematuria, fever, interstitial nephritis, phlebitis, crystalluria, and joint pain. In general, the side effects of most common medicines are mild and will disappear after stopping the medicine. In case of more serious side effects, the drug should be stopped immediately and then replaced with other drugs under the guidance of a doctor. Drugs need to be used under the guidance of a professional physician, and should not be used arbitrarily on their own.