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Urinary Tract Infection

Is there anything besides antibiotics to stop cystitis coming back? Does cranberry actually work?

There is a list, and a Korean review sorts it honestly: a few options are available now with mixed evidence, and the ones that get written about most are not yet usable.

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Answer

There are non-antibiotic options and they divide sharply by readiness: a 2026 Korean urology review reports that methenamine hippurate, D-mannose, oestrogen and cranberry extract are available now but show varying degrees of efficacy and safety, while microbiome-based approaches (probiotics, asymptomatic bacteriuria strains, faecal microbiota transplantation), bacterial vaccines, cytokine-targeted immunomodulation, bacteriophage therapy and nanoparticle delivery remain experimental — and the review's own conclusion is that most of these strategies will require further clinical validation before use in the general population.

Key takeaways

  • A 2026 Korean urology review surveys non-antibiotic options for recurrent urinary tract infection in the context of rising resistance.
  • Methenamine hippurate, D-mannose, oestrogen and cranberry extract are described as showing varying degrees of efficacy and safety.
  • Microbiome approaches covered include probiotics, deliberate colonisation with asymptomatic bacteriuria strains, and faecal microbiota transplantation.
  • Bacterial vaccines, cytokine-targeted immunomodulation, bacteriophage therapy and nanoparticle delivery are all still experimental.
  • The review states that most of these strategies require further clinical validation before general use.
  • The reason the question matters is resistance: fluoroquinolone resistance reaches 59.8 percent in Korean patients with recurrent cystitis.
  • None of these options is a substitute for treating an active infection.

The question is worth asking because the alternative is getting worse. In Korean national surveillance, fluoroquinolone resistance reached 59.8 percent among patients with recurrent cystitis — the group who need antibiotics most often are the group in whom they work least well.

What you can consider now

Four things are already available: methenamine hippurate, D-mannose, oestrogen, and cranberry extract. The review's phrasing about all four together is that they have shown varying degrees of efficacy and safety, which is accurate and deliberately unexciting. It is not an endorsement of any of them individually, and it is not a dismissal either.

What you cannot get yet

Bacteriophage therapy, bacterial vaccines, immunomodulation and nanoparticle delivery are the approaches that generate headlines, and none of them is something to ask a clinic for. The same is true of faecal microbiota transplantation for this indication. The review covers them because it is mapping a field, not because they are options.

The microbiome group has the strongest theoretical case, because a separate Korean study found that recurrent cystitis carries a different organism community from sporadic cystitis rather than a heavier dose of the same one. If recurrence is a disturbed community rather than a fresh invasion, restoring the community is aimed at the actual problem. That reasoning justifies trials; it does not yet justify a treatment.

The honest summary

This is a narrative review rather than a systematic one, which means the studies in it were selected and discussed rather than searched exhaustively and ranked. Its most useful sentence comes from authors with every reason to be optimistic about alternatives, and it says most of them are not ready. Prevention worth discussing with a doctor today is a short list; the long list belongs to the next few years.

Sources

  1. 1

    Kim DS, Choi CI, Choi JB, Choi T, Lee JW

    Non-antibiotic treatments for the management of recurrent urinary tract infection in the multidrug resistance era: A narrative review

    Investigative and Clinical Urology 2026;67(5):403-412

    doi:10.4111/icu.20250655 · PMID:42683852

    https://doi.org/10.4111/icu.20250655
  2. 2

    Yu SH, Jung SI, Lee SJ, Oh MM, Choi JB, Choi CI, Kim YJ, Park DJ, Bae S, Min SK

    Nationwide surveillance of antimicrobial resistance for uncomplicated cystitis in 2023: Conducted by the Korean Association of Urogenital Tract Infection and Inflammation

    Investigative and Clinical Urology 2025;66(2):161-171

    doi:10.4111/icu.20240302 · PMID:40047130

    https://doi.org/10.4111/icu.20240302