Most UTIs in men are treated with a course of oral antibiotics lasting 7 to 14 days, which is longer than the typical 3-day course prescribed for women. Symptoms like burning and urgency usually start improving within one to two days of starting treatment. Because UTIs are less common in men, your doctor will likely want to identify why the infection occurred and may order additional testing beyond a simple urine sample.
Why UTIs Are Different in Men
UTIs in men are relatively uncommon compared to women, largely because the male urethra is longer, making it harder for bacteria to reach the bladder. When an infection does occur, it often signals an underlying issue. Enlarged prostate, kidney stones, incomplete bladder emptying, urethral narrowing, or structural abnormalities in the urinary tract can all create conditions where bacteria thrive. This is why guidelines from both the Infectious Diseases Society of America and the European Association of Urology generally classify male UTIs as potentially complicated, meaning they warrant closer investigation even when symptoms seem mild.
An uncomplicated UTI in a man is defined as an infection confined to the bladder without fever or systemic symptoms. A complicated UTI is one that has spread beyond the bladder, involves fever, or occurs alongside a catheter or anatomical abnormality. These classifications guide how aggressively the infection needs to be treated.
Getting a Diagnosis
Unlike in women, where UTIs are sometimes diagnosed based on symptoms alone, men should expect a urine culture. The American Urological Association recommends obtaining a culture with susceptibility testing for all cases of cystitis in men. This tells your doctor exactly which bacteria are causing the infection and which antibiotics will work against it. In men, bacterial counts as low as 1,000 colony-forming units per milliliter in a urine sample can indicate a true infection, depending on the type of bacteria found.
Your doctor will also want to rule out bacterial prostatitis, which can look very similar to a bladder infection. Both cause burning with urination, urgency, and frequency. But prostatitis typically adds pelvic, rectal, or perineal pain, painful ejaculation, and systemic symptoms like fever and chills. A gentle digital rectal exam can help distinguish the two: a normal prostate points toward a simple bladder infection, while a tender, swollen, or boggy prostate suggests prostatitis. If prostatitis is suspected, vigorous prostate massage is avoided because it can push bacteria into the bloodstream.
First-Line Antibiotic Treatment
For uncomplicated bladder infections in men, the preferred antibiotics are trimethoprim/sulfamethoxazole, taken twice daily, and nitrofurantoin (extended-release), also taken twice daily. Trimethoprim alone is another first-line option. A seven-day course has been shown in randomized trials to be as effective as longer courses for men without fever.
When those first-line options aren’t suitable, fluoroquinolones like ciprofloxacin or levofloxacin are alternatives. The American Urological Association lists these as preferred treatments as well. Treatment duration for men generally ranges from 7 to 14 days, and the optimal length isn’t firmly established, so your doctor may adjust based on how quickly your symptoms respond and your culture results.
If the infection has spread to the kidneys or prostate, treatment is longer and may involve different antibiotics or, in severe cases, intravenous medication in a hospital setting. Prostatitis, in particular, often requires several weeks of antibiotics because the prostate gland is harder for drugs to penetrate.
Managing Symptoms While Antibiotics Work
Antibiotics kill the bacteria, but they don’t immediately stop the burning and urgency. Most men notice improvement within one to two days, but the first 24 to 48 hours can be uncomfortable. Phenazopyridine is an over-the-counter urinary pain reliever that numbs the lining of the urinary tract. It’s taken as 200 mg three times a day after meals. It will turn your urine bright orange or red, which is harmless but can stain clothing and contact lenses.
Phenazopyridine is meant for short-term use only, typically two days alongside antibiotics, not as a standalone treatment. It should not be used if you have kidney disease, and it can worsen liver problems. Drinking plenty of water helps flush bacteria and dilute urine, which can reduce the sting of urination on its own.
What About Supplements?
Cranberry products and D-mannose are widely marketed for UTI prevention, but the clinical evidence is limited, and nearly all of it comes from studies in women. A large clinical trial across 99 medical practices in England and Wales found that D-mannose did not prevent recurrent UTIs, and that study only included women. There is essentially no rigorous clinical data on whether these supplements help men. They’re unlikely to cause harm in most people, but they shouldn’t replace antibiotics for an active infection.
Recurrent Infections and Further Workup
A single UTI in a man older than 50 is often related to prostate enlargement slowing urine flow. In younger men, a UTI is more unusual and may prompt earlier investigation. If infections keep coming back, your doctor may recommend imaging of the urinary tract or a referral to a urologist to look for structural problems like kidney stones, urethral strictures, bladder pouches (diverticula) that trap urine and bacteria, or congenital abnormalities. Conditions that impair bladder emptying, including diabetes, neurological disorders, and stroke, also increase the risk of recurrent infections.
Treating the underlying cause is the most effective way to stop UTIs from returning. Antibiotics clear each individual infection, but if urine continues to pool or flow is obstructed, bacteria will keep finding a foothold.
Signs the Infection Is Spreading
Most bladder infections stay in the bladder and respond well to oral antibiotics. But a UTI can progress to a kidney infection or, rarely, to urosepsis, where bacteria enter the bloodstream. Warning signs include high fever with chills, flank or back pain, nausea and vomiting, rapid heart rate, difficulty breathing, or an inability to urinate. A systolic blood pressure reading below 100 or a respiratory rate faster than 22 breaths per minute are clinical red flags. If you develop these symptoms during a UTI, go to an emergency room. Urosepsis is a medical emergency that requires immediate treatment.