Norfloxacin capsules should normally be taken before meals. Norfloxacin capsules belong to quinolone antibiotics, mainly used to treat bacterial infectious diseases, such as urinary tract infections, gastroenteritis and so on. The drug is usually required to be taken on an empty stomach, so that food does not affect the absorption of the drug as well as affect the efficacy of the drug, so it should be taken before meals. Norfloxacin capsules should also pay attention to appropriate drinking more water, because this product may lead to the formation of crystalline urine, and even affect the patient’s kidney function because of crystalline urine. Drinking more water appropriately can prevent the above adverse reactions. Norfloxacin capsule may also cause side effects related to central nervous system symptoms such as convulsions, anxiety, gastrointestinal reactions such as nausea, loss of appetite and allergic reactions. Therefore, it needs to be used reasonably under the guidance of a doctor, and should pay attention to observe the occurrence of adverse reactions during the use of medication, and timely treatment.