Urinary tract infections refer to infections of the urethra and bladder. The urethra is the passageway that carries urine from the bladder to the outside of the body. The urethra and bladder are closely connected, and urethral infections often ascend to cause bladder inflammation. Urinary tract infections originate from E. coli bacteria, which colonize the vagina and invade the urethra. These bacteria are present in all women. Men can also contract this disease, though it is relatively rare. Male urinary tract infections are usually caused by sexually transmitted diseases.Nonspecific urethritis and gonorrhea are the two STDs most commonly responsible for urethral and bladder inflammation. Medication Treatment Below are the primary medications used to treat urinary tract infections. While available at most pharmacies, experts advise readers experiencing discomfort to seek proper medical examination at a hospital. Do not self-medicate, as incorrect treatment may lead to serious consequences.1. Amoxicillin: A broad-spectrum antibiotic effective against most Gram-positive bacteria, used for infections of the skin, mucous membranes, soft tissues, and urinary tract. 2. Norfloxacin and Levofloxacin: Primarily used for middle respiratory tract and gastrointestinal infections, with notable efficacy against urinary tract infections.
3 Ceftriaxone Sodium: Used for lower respiratory tract infections, skin/soft tissue infections, bone infections, urinary tract infections, hepatobiliary infections, intra-abdominal infections, gonorrhea, bacteremia, and meningitis caused by susceptible bacteria such as Enterobacteriaceae. Administered intravenously.
4 Cefradine: Also known as Cefradine. Used for infections of the respiratory system, urinary system, skin, and soft tissues, such as bronchitis, pneumonia, pyelonephritis, cystitis, ENT infections, enteritis, and dysentery.
5 Ciprofloxacin: Used for urethritis and cervicitis caused by Chlamydia and Mycoplasma.
6 Sulfonamides: Due to their potent bacteriostatic effect against most Escherichia coli strains, high urinary solubility, low resistance development, and affordability, they are often the first-line choice for initial infections. Common formulations include sulfamethoxazole (SMX), typically combined with the synergist trimethoprim (TMP)(known as compound sulfamethoxazole SMZco). The dosage is 50mg/(kg·d) divided into two doses. The typical treatment course is 1-2 weeks. To prevent crystallization in urine, increased fluid intake is recommended. Use with caution in patients with renal impairment.
7 Pipemidic acid (PPA): Highly effective against E. coli urinary tract infections due to its high urinary excretion rate. Suitable for all types of UTIs. Dosage: 30-50 mg/(kg·d) orally in 3-4 divided doses. Minimal side effects, though mild gastric discomfort may occur. Use with caution in young children.
8 Furazolidone: Broad-spectrum antibacterial activity with marked efficacy against Escherichia coli and low susceptibility to resistance development. Dosage: 8–10 mg/(kg·d) orally in three divided doses.May cause gastrointestinal reactions; best taken after meals. Can be combined with TMP. Furazolidone is particularly suitable for prolonged treatment (3-4 months) of refractory infections.
9. Ciprofloxacin: A fully synthetic, broad-spectrum quinolone antibiotic with potent activity against Gram-negative and Gram-positive bacteria. Dosage: 5-10 mg/(kg·d), divided into 3-4 oral doses. Due to its strong antimicrobial action, prolonged use may cause dysbiosis; caution is advised. Generally not used in infants.
10. Ampicillin and Cefalexin: Both are broad-spectrum antibiotics with good bacteriostatic effects, commonly used for urinary tract infections. Although kanamycin and gentamicin exhibit strong bacteriostatic activity, their significant nephrotoxicity and potential adverse effects on hearing necessitate cautious use.
Duration of Therapy: For acute infections where the selected antibiotic is effective against the causative bacteria, a 10-day course typically controls infection in most patients. A 5-day course may suffice for cases without fever. Regular follow-up for one year or longer is recommended post-recovery. Since most recurrences result from reinfection, long-term prophylaxis is not advised for all patients.
Specific recommendations are as follows: ① For infrequent recurrences, treat each episode acutely. ② For recurrent cases, after acute symptoms resolve, administer one of the following at a reduced dose (1/3–1/4 of therapeutic dose) once daily at bedtime: SMZco, furazolidone, pipefloxacin, or ofloxacin. This regimen may continue for 3–6 months.For patients with multiple recurrent infections or existing renal parenchymal damage, the treatment duration may be extended to 1–2 years. To prevent the emergence of drug-resistant strains, combination therapy or rotating regimens may be employed, switching medications every 2–3 weeks to enhance efficacy.