Most bladder infections require a short course of antibiotics to clear the bacteria causing the infection. Your doctor will typically prescribe one of a few well-established options, and most people feel significantly better within one to two days of starting treatment. While you wait for the antibiotic to work, over-the-counter products can help manage the burning and urgency that make bladder infections so miserable.
First-Line Antibiotics
Three antibiotics are most commonly prescribed for uncomplicated bladder infections. The one your doctor picks depends on local resistance patterns, your kidney function, and any drug allergies.
Nitrofurantoin is one of the most frequently prescribed options. It’s typically taken twice a day for five days. It works well against common bladder bacteria and has relatively low resistance rates compared to older antibiotics. One important limitation: it’s not safe for people with significantly reduced kidney function, so your doctor may choose something else if your kidneys aren’t filtering well.
Trimethoprim-sulfamethoxazole (often called Bactrim or Septra) used to be the default choice for bladder infections. It’s still effective, but resistance has climbed. The Infectious Diseases Society of America noted in 2025 that resistance rates for common urinary bacteria now exceed the thresholds that guidelines once set for using this drug as a go-to first pick. In many areas it still works, but your doctor may check local resistance data or culture results before prescribing it.
Fosfomycin is a single-dose option, which makes it appealing if you want the simplest possible treatment. It comes as a powder that you dissolve in about half a cup of cool water and drink immediately. Interestingly, studies have shown that taking multiple doses doesn’t improve cure rates over the single dose but does increase side effects.
Over-the-Counter Pain Relief
Antibiotics kill the bacteria, but they don’t numb the pain right away. That’s where OTC urinary pain relievers come in. The two main products you’ll find at the pharmacy work in different ways.
Azo Standard contains phenazopyridine, a dye that coats the lining of your urinary tract and dulls the burning, urgency, and pressure. The standard version has 95 mg per tablet, while the maximum strength version has 97.5 mg. It will turn your urine bright orange (sometimes red), which is harmless but can stain clothing and contact lenses. Phenazopyridine does not kill bacteria. It only manages symptoms, so it’s not a substitute for antibiotics. It’s meant for short-term use, typically no more than two days when used alongside an antibiotic.
Cystex takes a different approach. Each tablet combines 162 mg of methenamine (an antiseptic that slows bacterial growth) with 162.5 mg of sodium salicylate (a mild pain reliever related to aspirin). It offers a modest dual action, but like Azo, it won’t cure the infection on its own.
Home and Natural Remedies
Several natural products are popular for bladder infections, though none replace antibiotics for an active infection.
D-mannose is a sugar that works by sticking to E. coli bacteria (the cause of most bladder infections) and preventing them from latching onto the walls of the urinary tract. Clinical trials have tested doses of 1 gram three times a day for two weeks, then 1 gram twice daily for ongoing prevention. The evidence is more promising for preventing repeat infections than for treating one that’s already established. You can find D-mannose as a powder or capsule at most health food stores.
Cranberry products operate on a similar principle, making it harder for bacteria to stick to the bladder wall. They’re better supported for prevention than treatment. If you’re prone to repeat infections, daily cranberry supplements or unsweetened cranberry juice may be worth trying.
Uva ursi (bearberry leaf) is an herbal antiseptic that some people use for urinary symptoms. It’s considered possibly safe for short-term use of up to one month, but high doses or long-term use can cause liver damage, breathing problems, and seizures. It should never be given to children. If you try it, keep the duration short and don’t rely on it as a stand-in for medical treatment.
Preventing Repeat Infections
If you get bladder infections frequently, your doctor may discuss preventive strategies beyond “drink more water.” One option gaining traction is methenamine hippurate, a prescription antiseptic that stops bacteria from growing in the urine. A large study found that over 12 months, women taking methenamine had nearly the same reduction in infections as women taking daily preventive antibiotics. Women in the methenamine group averaged 1.4 infections per year compared to 0.9 in the antibiotic group, with similar safety profiles. The advantage is that methenamine doesn’t contribute to antibiotic resistance, which makes it attractive for long-term use.
Other preventive measures include urinating soon after sex, wiping front to back, staying well-hydrated, and avoiding irritating products like douches or scented sprays near the urethra. Vaginal estrogen cream is sometimes prescribed for postmenopausal women, since declining estrogen changes the vaginal environment in ways that make infections more likely.
Signs the Infection Has Spread
A bladder infection that moves to the kidneys is a more serious problem. Watch for fever, pain in your back or side (especially on one side), nausea or vomiting, and chills. These symptoms suggest a kidney infection, which typically requires a longer or stronger course of antibiotics. If you develop a high fever or feel significantly worse after starting treatment for a bladder infection, that warrants prompt medical attention rather than waiting it out.