Treatment of Recurrent Urinary Tract Infections

Acute Episode Management

The European Urology guidelines recommend treating acute episodes with short-course, culture-guided antibiotics (≤7 days) 1, 2
Obtain urine culture and susceptibility testing before initiating treatment for every symptomatic acute episode, to establish baseline patterns and guide therapy based on bacterial sensitivities 1, 3, 4
Patient-initiated treatment (self-start) may be offered to select patients while awaiting culture results 3, 4
First-line agents for acute episodes include Nitrofurantoin (100 mg twice daily for 5 days), Fosfomycin trometamol (3 g single dose), and Trimethoprim-sulfamethoxazole (160/800 mg twice daily for 3 days, if local E. coli resistance <20%) 1, 2
Treat for ≤7 days maximum, as shorter courses balance symptom resolution against resistance risk and recurrence 5, 3

The European Urology guidelines recommend non-antimicrobial interventions as the first line of prevention, including vaginal estrogen replacement for postmenopausal women, immunoactive prophylaxis, and methenamine hippurate for women without urinary tract abnormalities 1, 2, 6
Increase fluid intake for premenopausal women 1, 2, 6
Consider weaker evidence options, such as probiotics with proven vaginal flora efficacy, cranberry products, and D-mannose, but counsel patients about limited or contradictory evidence 1, 2, 6
For refractory cases, consider endovesical instillations of hyaluronic acid or hyaluronic acid/chondroitin sulfate combination when less invasive approaches fail 1, 2, 6

Use continuous or postcoital antimicrobial prophylaxis only after non-antimicrobial interventions have been unsuccessful, due to the risk of adverse effects, development of antimicrobial resistance, and collateral damage to normal flora 1, 2, 5
Consider self-administered short-term antimicrobial therapy at symptom onset for compliant patients 1, 2

Do not treat asymptomatic bacteriuria, as surveillance urine testing in asymptomatic patients should be omitted 5, 3
Do not perform extensive workup (cystoscopy, full abdominal ultrasound) in women <40 years with recurrent UTI and no risk factors 1, 2, 6
Do not use fluoroquinolones or trimethoprim-sulfamethoxazole empirically in areas with high resistance rates (>20% for E. coli) or in patients recently exposed to these agents 5
Do not continue antibiotics beyond 7 days for acute cystitis episodes, as longer courses increase resistance without improving outcomes 5, 3

If symptoms recur within 2 weeks of treatment completion, assume the organism is not susceptible to the original agent and retreat with a 7-day regimen using a different antibiotic 1, 2, 7
Repeated pyelonephritis should prompt consideration of a complicated etiology requiring further investigation 1, 2
Men with recurrent UTI should be treated for 7 days with trimethoprim-sulfamethoxazole 160/800 mg twice daily (or fluoroquinolones based on local susceptibility) 1, 2