Treatment of urinary tract infections with levofloxacin is usually administered orally 3 times/day, 1 capsule/time, for one week as a course of treatment. Two capsules can be taken at the first dose and one capsule at each subsequent dose, which is medically known as doubling the first dose, so that the blood concentration of the drug can be reached within one half-life, which can make the drug concentration in the blood rise quickly and achieve the purpose of controlling the infection quickly. When taking levofloxacin hydrochloride, some patients may have symptoms of digestive discomfort, so consider taking it after meals, not on an empty stomach. If the patient’s symptoms do not improve after more than 3 days of continuous medication, it is considered that the diagnosis is wrong or there is levofloxacin resistance, so it is necessary to go to the hospital to change the antibiotic or to review it. If necessary, adjust other drugs for treatment or check for other diseases.