Urinary tract infection is caused by a variety of pathogens invade the body, urinary tract infection need to take how long the medicine, the doctor will be based on the actual situation of patients with urinary tract infection to make the appropriate decision, so the course of medication there are some differences. The specifics are as follows. 1. Acute cystitis: patients are given antibacterial drug therapy, such as amoxicillin, furadantoin, etc., the treatment cycle is usually about 1 week. 2. Pyelonephritis: patients can be treated with oral medications, commonly used drugs are ofloxacin, ciprofloxacin, etc., and the course of treatment is usually within 10~14 days. 3. Recurrent urinary tract infection: it is divided into re-infected patients and recurrent and pyelonephritis patients. (1) Re-infected patients: commonly used are compound sulfamethoxazole, furotoxin, ofloxacin, etc. The drugs are changed every 7~10 days, and need to be used continuously for half a year. (2) Patients with recurrence and pyelonephritis: patients are given bactericidal antibiotic treatment, such as benzylpenicillin, amoxicillin, etc., and the course of treatment should not be less than six weeks. 4. Complicated urinary tract infection: antibacterial drug treatment, such as levofloxacin, etc., usually for a period of 2 weeks. 5. Urinary tract infections during pregnancy: medication for women during pregnancy should be used less toxic antibacterial drugs, such as amoxicillin, etc., the treatment time is usually 3 to 7 days. Drugs should be used in accordance with the doctor’s instructions, do not increase or decrease the dose of drugs or stop, so as not to delay the condition or cause adverse reactions.