How Are UTIs Treated? Root Cause Approach & Novel Therapies

Urinary tract infections (UTIs) are caused by bacteria or fungi in the urinary tract, which includes the urethra, bladder, ureters, and kidneys. With a wide range of bacteria and fungi capable of causing UTIs, and variability in the types and severity of UTI symptoms, treatment is determined by a doctor after taking into account your medical history as well as test results identifying the pathogen causing your UTI.

Antibiotic Therapy

Antibiotics are a type of drug that targets bacteria. These work by disrupting the bacteria's ability to kill bacteria or stop them from multiplying. Most UTIs are treated with antibiotics because bacteria are often the culprit.

If you have a UTI or are suspected of having a UTI, it is likely that your doctor will write you a prescription for an antibiotic. It is important to complete the full course of your antibiotic to help prevent the bacteria from developing antibiotic resistance. Additionally, do not take antibiotics that were meant for other illnesses, as they may not work and could make treating your UTI symptoms more difficult.

In more serious UTI cases that require hospitalization, especially when sepsis is of concern, your doctor may give you intravenous antibiotics. This more quickly slows the spread of the bacteria by putting the antibiotic into your bloodstream. Your doctor will monitor you and adjust treatment as needed until your UTI symptoms subside.

Antifungal Therapy

Most UTIs are caused by bacteria; however, some can be caused by fungal pathogens. Fungal UTIs require a different type of drug to treat them. These types of medications are called antifungals. Antifungals also prevent the fungus from multiplying to allow your immune system to clear the infection.

If a fungal pathogen is identified as the cause of your UTI symptoms, your doctor will prescribe you an antifungal medication. Just like antibiotics, it is important to complete the full course of antifungal medication to help prevent the fungus from developing antifungal resistance. Do not take antifungals that were not prescribed for your UTI symptoms.

Fungal UTIs can also become very serious. If required, your doctor may also use intravenous antifungal medication to help your body clear the infection.

Side effects

Taking antibiotics or antifungals may produce side effects in some people. These side effects are often drug-specific. Your doctor should discuss potential side effects from treatment and potential mitigation strategies with you.

Common side effects from antibiotic and antifungal drugs include:

• Nausea
• Diarrhea
• Headache
• Dizziness
• Loss of appetite
• Overgrowth of fungal or other infections

Urinary Antiseptics

Urinary antiseptics are a class of medications that work locally within the urinary tract to reduce bacterial load. They are most often used as part of a long-term prevention strategy for people who experience recurrent UTIs.

One of the most well-studied urinary antiseptics is methenamine hippurate, which converts to formaldehyde in acidic urine and creates an environment that is inhospitable to bacterial growth. Unlike antibiotics, methenamine does not carry the same risk of contributing to antibiotic resistance, making it an appealing option for ongoing prophylaxis. Research supports its use particularly in women with recurrent, uncomplicated UTIs.

Other antiseptic approaches include urinary acidifying agents and compounds that reduce bacterial adherence to the bladder wall. These are often used alongside other therapies as part of a comprehensive management plan rather than as standalone treatments.

Hormonal Care

Hormonal changes, particularly declining estrogen levels, can significantly affect the health of the urinary tract and contribute to recurrent UTIs. Estrogen plays an important role in maintaining the integrity of the vaginal and urethral tissues, supporting a healthy urinary microbiome rich in protective Lactobacillus species. When estrogen levels drop, these tissues become thinner and more vulnerable, and the microbial balance shifts in ways that allow harmful bacteria to take hold more easily.

Local vaginal estrogen therapy, available as a cream, ring, or suppository, is one of the most evidence-backed approaches for reducing recurrent UTIs in women. By restoring tissue integrity and promoting a healthy vaginal environment, local estrogen reduces the conditions that allow bacteria to ascend into the bladder. Because it is administered locally rather than systemically, it carries a favorable safety profile for most patients.

Hormonal care is often incorporated alongside other treatment pillars to address the root causes of recurrence rather than simply treating each episode in isolation. Your provider will evaluate whether hormonal therapy is a good fit based on your history, symptoms, and any relevant contraindications.

Advanced Therapies

As our understanding of recurrent and treatment-resistant UTIs deepens, a new class of interventions is emerging that goes beyond conventional antibiotic-based care. These therapies target structural, mucosal, and chronic infectious factors that standard treatments often cannot fully address. They represent a promising frontier in UTI management, and while early clinical experience has been encouraging, further research is still needed to establish long-term outcomes, standardized protocols, and broader clinical guidelines. For patients who have not found adequate relief through traditional approaches, these options may be worth discussing with a specialist, such as Biotia's telehealth partner Clinova Solutions.

Bladder Instillation Therapy

Bladder instillation involves the delivery of medication directly into the bladder via a small catheter. This approach targets the bladder's inner lining, known as the glycosaminoglycan (GAG) layer, which acts as a protective barrier against bacteria and irritants. In patients with recurrent UTIs or bladder hypersensitivity, this layer is often compromised.

Instillation solutions may contain medication designed to eliminate infections, replenish and repair the GAG layer, reduce inflammation, and create an environment where bacteria are less able to stick to the layer and persist. Treatment is typically administered over a series of sessions and may be continued as maintenance therapy.

Patients who may benefit from bladder instillation include those with persistent bacterial concerns, recurrent culture-positive UTIs despite appropriate antibiotic therapy, or concurrent bladder sensitivity or inflammatory symptoms.

Electrofulguration

Electrofulguration is a minimally invasive procedure performed during a cystoscopy, a procedure in which a healthcare provider uses a thin tube with a small camera to look inside the bladder through the urethra. During electrofulguration, a small electrical current is used to remove or destroy abnormal, irritated, or chronically inflamed areas of bladder tissue that may be contributing to symptoms. It has historically been associated with the treatment of interstitial cystitis/bladder pain syndrome, particularly for Hunner lesions – painful, red, and inflamed patches on the bladder wall. In the context of recurrent UTI, electrofulguration may be considered when there is evidence of chronically embedded bacteria within the bladder wall or when other interventions have been insufficient.

This procedure requires specialist evaluation and cystoscopic assessment. Its application in recurrent UTI management is an evolving area of research.

Root Cause Analysis

Effectively treating a UTI, and more importantly preventing the next one, requires more than reaching for the nearest antibiotic. True resolution starts with understanding why the infection happened in the first place. Recurrent UTIs rarely have a single cause, and no two patients arrive at their diagnosis the same way. A thorough evaluation looks beyond the infection itself to understand why UTIs may be happening or recurring. We examine several interconnected factors, including hormonal and metabolic health (such as low estrogen levels or elevated blood sugar), the specific bacteria or other organisms involved and how they respond to treatment, inflammatory or autoimmune conditions that can cause symptoms similar to infection, structural issues within the urinary tract that may make infections more likely, and the health of the urinary and vaginal microbiome. When the natural balance of protective bacteria is disrupted, it can become easier for harmful bacteria to grow and cause symptoms. By looking at the whole picture, we can create a treatment plan that addresses the root causes rather than simply treating each infection as it occurs. When these contributing factors are identified and addressed together, treatment becomes far more targeted and far more likely to break the cycle of recurrence rather than simply manage each episode as it comes.

Testing and Treatment

Sometimes doctors will prescribe patients who experience frequent, persistent, or recurrent UTIs with drugs to take when symptoms return. It is important to know that taking antibiotic or antifungal medication can interfere with diagnostic testing for UTIs. If you take a urine test several days after starting treatment, it is possible that there will be too few bacteria or fungi to detect, giving you a false negative result. This can become an issue if the pathogen causing your UTI is resistant to the drug you are taking, meaning your UTI could later return once treatment is stopped. It is best to get tested prior to starting treatment – consult with your doctor to come up with a plan appropriate for you.

Precision Treatment Starts With Accurate Diagnosis

Choosing the right UTI treatment depends entirely on knowing which pathogen is causing the infection. Standard urine culture identifies common bacterial pathogens but can miss less common bacteria, fungi, and organisms that require special culture conditions. It also does not routinely test for antibiotic resistance genes, meaning you may be prescribed an antibiotic to which your pathogen is already resistant. When the underlying pathogen or its resistance profile isn't known, treatment becomes a guess — and for patients who have been through multiple failed courses, that guess carries real consequences. The BIOTIA-ID Urine Test uses next-generation sequencing (NGS) to identify over 40 urogenital pathogens with antibiotic resistance markers in a single test — giving your clinician the information needed to prescribe a targeted, effective treatment from the start.

Non-antibiotic and Adjunctive Strategies for UTIs

Antibiotics and antifungals are the primary treatments for active UTIs, but they are not the whole picture — particularly for people who experience recurrent infections. A number of non-antibiotic and supportive strategies may help reduce how often UTIs return or support recovery alongside medical treatment. None of these replace prescription treatment, and their effectiveness varies from person to person. Always discuss any new approach with your doctor before starting.

Hydration is one of the most straightforward supportive measures. Drinking adequate fluids helps flush the urinary tract and may reduce the concentration of bacteria in the bladder. While hydration alone is unlikely to clear an active infection, it is commonly recommended as part of an overall UTI management plan.

Cranberry products — including supplements and juice — have been studied for their potential to prevent certain bacteria from attaching to the lining of the bladder. Evidence is mixed, and cranberry is not considered a treatment for active infections. Some studies suggest a modest preventive benefit for people with recurrent UTIs, particularly those caused by E. coli. Talk to your doctor about whether cranberry supplementation makes sense for your situation.

D-mannose is a naturally occurring sugar that may interfere with how certain bacteria — primarily E. coli — adhere to urinary tract cells. Research into its use as a preventive strategy is ongoing, and current evidence is promising but not yet definitive.

Probiotics, particularly those containing Lactobacillus strains, are being studied for their potential to support a healthy urinary and vaginal microbiome, which may in turn reduce UTI susceptibility. This area of research is still developing, and probiotic formulations vary widely in their composition and quality.

Behavioral modifications — such as urinating after sexual activity, staying well-hydrated, and avoiding spermicide-based contraceptives — are evidence-informed recommendations that may lower recurrence risk for some people.

For postmenopausal women, topical vaginal estrogen is an adjunctive therapy with meaningful clinical evidence for reducing UTI recurrence, as discussed in separate Biotia resources on menopause and UTI risk.

It's worth noting that non-antibiotic strategies work best when they complement — not replace — accurate diagnosis. Understanding which pathogen is present and whether it carries antibiotic resistance markers can shape the entire treatment and prevention strategy. If standard urine culture has not provided clear answers, advanced testing such as the BIOTIA-ID Urine Test may help identify what's driving your recurrent infections and inform a more targeted plan with your provider.