The Evidence on Non-Antibiotic UTI Prevention
Recurrent UTIs are frustrating, and daily antibiotics were the default fix for years. With antibiotic resistance rising, here is what the evidence says about the alternatives.
NOTE: This is for women with recurrent uncomplicated UTIs diagnosed by a doctor, and is about prevention, not treatment.
| Option | What the evidence shows | Verdict |
|---|---|---|
| Methenamine hippurate | In a UK trial of 240 women, it worked almost as well as a daily antibiotic (about 1.4 UTIs a year vs 0.9). Fewer women on it grew antibiotic-resistant bacteria (56% vs 72%). | Strongest. Almost as good as daily antibiotics |
| Vaginal estrogen (after menopause) | A review of studies found it lowers the chance of UTIs coming back. But one study found UTIs came back more than twice as often as with a daily antibiotic. Side effects are uncommon. | Strong, but may work less well than antibiotics |
| Cranberry | About 28% fewer UTIs than a dummy treatment, based on 50 trials combined. Not as strong as antibiotics, but it doesn’t cause antibiotic resistance. It didn’t help older adults in care homes. Juice adds sugar, and some products cause heartburn. | Modest |
| D-mannose | A sugar that may stop bacteria sticking to the bladder. But in a trial of 598 women, about as many got another UTI within six months on D-mannose (51%) as on a dummy powder (56%). Antibiotic use and symptoms didn’t improve either. | Not proven |
| More water | In a one-year trial, women before menopause who drank under 1.5 litres a day and added 1.5 litres of water had about 2 UTIs a year instead of 3. Little extra benefit if you already drink plenty. With heart or kidney disease, check with your doctor first. | Helps if you drink little |
| MV140 vaccine and probiotics | MV140 is a vaccine taken under the tongue. In a large trial, 56–58% of women stayed UTI-free. Probiotics delayed the first UTI. Both need more studies. | Emerging. Availability varies |
| Everyday habits | Switching to contraception without spermicide, peeing after sex and wiping front to back haven’t been proven to help in studies, but they are low risk. | Optional |
| Antibiotics (daily or after sex) | They work, but can cause side effects and antibiotic resistance. The 2025 urology guideline now lists more non-antibiotic options to cut down their use. | Fallback if the above fail |
The Bottom Line
Methenamine (and vaginal estrogen after menopause) has the strongest non-antibiotic evidence. Cranberry helps modestly, D-mannose hasn’t held up, and extra water helps only if you drink little. Talk to your doctor about what suits you.
Related: Medical Myths or Facts #18: Do Probiotics Prevent Recurrent UTIs?, UTIs No More: Do Cranberries Help?
References
- Munir A, Tarannum T, Saad N, Abdaal M. Effectiveness of Non-Antibiotic Therapies in the Management of Recurrent Urinary Tract Infections in Women: A Systematic Review. Int Urogynecol J. 2026.
- Harding C, Mossop H, Homer T, et al. Alternative to prophylactic antibiotics for the treatment of recurrent urinary tract infections in women: multicentre, open label, randomised, non-inferiority trial. BMJ. 2022;376:e068229.
- Harding C, Chadwick T, Homer T, et al. Methenamine hippurate compared with antibiotic prophylaxis to prevent recurrent urinary tract infections in women: the ALTAR non-inferiority RCT. Health Technol Assess. 2022;26(23):1-172.
- Ackerman AL, Bradley M, D’Anci KE, et al. Updates to Recurrent Uncomplicated Urinary Tract Infections in Women: AUA/CUA/SUFU Guideline (2025). J Urol. 2025;215(1):3-12.
- Huang AJ, Grady D, Mody L. Recurrent Urinary Tract Infection in Older Outpatient Women. JAMA Intern Med. 2024;184(8):971-972.
- Han Z, Yi X, Li J, Liao D, Ai J. Nonantibiotic prophylaxis for urinary tract infections: a network meta-analysis of randomized controlled trials. Infection. 2025;53(2):535-546.
- Hayward G, Mort S, Hay AD, et al. d-Mannose for Prevention of Recurrent Urinary Tract Infection Among Women: A Randomized Clinical Trial. JAMA Intern Med. 2024;184(6):619-628.
- Hooton TM, Vecchio M, Iroz A, et al. Effect of Increased Daily Water Intake in Premenopausal Women With Recurrent Urinary Tract Infections: A Randomized Clinical Trial. JAMA Intern Med. 2018;178(11):1509-1515.
- Cantón R, Lim AN, Cortés V, Díaz-Regañón J. Uncomplicated Urinary Tract Infections: From an Invisible Impact to a Visible Change in Complex Care. Clin Infect Dis. 2026;82(6):e1194-e1199.
- Sihra N, Goodman A, Zakri R, Sahai A, Malde S. Nonantibiotic prevention and management of recurrent urinary tract infection. Nat Rev Urol. 2018;15(12):750-776.
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