Levofloxacin Hydrochloride 0.5g is usually 1 tablet for 1 day, but it can be increased or decreased according to the infection. However, this should be done under the guidance of a doctor. According to the relevant instructions of Levofloxacin Hydrochloride 0.5g, for common respiratory system infections, urinary system infections, reproductive system infections, etc., the regular dosage of the medicine in China is 1 tablet orally for 1 day. If it is a dispersible tablet, it can be put into 100ml of water, shaken well and dispersed for oral administration. One time 0.2~0.3g, 2~3 times a day. However, if the infection is relatively serious, such as white blood cells, neutrophils and other infection indicators are significantly higher, the dose can be appropriately increased under the guidance of the doctor, but the specific use of the doctor needs to be prescribed by the doctor, according to different situations to determine the specific dosage, subject to medical advice.