Yes, H. pylori is curable. A standard course of antibiotics eliminates the infection in roughly 80% to 90% of people on the first attempt, and those who don’t respond initially can try a different combination of medications. Most people clear the bacteria permanently, though the treatment itself takes some commitment and the side effects can be unpleasant enough to tempt you into stopping early.
How Treatment Works
Curing H. pylori requires a combination of antibiotics and an acid-suppressing medication, taken together for 14 days. The antibiotics attack the bacteria from different angles, while the acid suppressor raises the pH inside your stomach, creating an environment where the antibiotics work more effectively. You can’t cure H. pylori with a single antibiotic the way you might treat a urinary tract infection. The bacteria live in the thick mucus lining of the stomach, which makes them difficult to reach, so the multi-drug approach is essential.
The current preferred first-line regimen in the United States, according to the American College of Gastroenterology, is a four-drug combination called bismuth quadruple therapy, taken for 14 days. This approach is recommended when your doctor doesn’t know which antibiotics your specific strain of H. pylori is resistant to, which is the case for most people. Newer acid-suppressing drugs that work differently from traditional options are also showing strong results and may be offered as alternatives.
Realistic Cure Rates
First-line bismuth quadruple therapy clears the infection in about 86% to 88% of patients. That’s a strong success rate, but it means roughly 1 in 8 people will need a second round with a different drug combination. Older triple-therapy regimens, which used only three medications for 7 days, have fallen below the 80% success threshold in many countries and are no longer the go-to option in most cases.
Extending treatment from 7 days to 14 days improves the cure rate by about 8 percentage points, which is one reason current guidelines now favor the longer course. A newer acid-suppressing medication called vonoprazan, which lowers stomach acid more powerfully than traditional options, has pushed eradication rates to around 90% or higher in clinical trials. In one large comparison involving over 14,000 patients, vonoprazan-based regimens were roughly twice as likely to succeed as regimens using older acid suppressors. This advantage is even more dramatic against antibiotic-resistant strains: vonoprazan cured 82% of patients infected with clarithromycin-resistant H. pylori, compared to just 40% with a traditional acid suppressor.
What Happens if the First Round Fails
If your first treatment doesn’t work, you’re not out of options, but the odds do shift. When bismuth quadruple therapy is used as a second-line “salvage” treatment, the success rate drops to about 69%. No salvage regimen has consistently exceeded 70% in large studies. This is why getting the first round right matters so much.
The most common reason treatment fails is antibiotic resistance. The bacteria in your stomach may already be resistant to one of the antibiotics in your regimen before you even start. This is a growing global problem, particularly with clarithromycin, one of the most widely used antibiotics against H. pylori. Most guidelines now recommend clarithromycin-based regimens only in areas where resistance rates are reliably below 15% to 20%. After a failed first attempt, your doctor may order a susceptibility test to identify exactly which antibiotics your strain responds to, rather than guessing with another empiric combination.
Why Some People Don’t Respond
Beyond antibiotic resistance, several other factors predict whether treatment will work. Smoking is associated with lower cure rates. Older age, a heavier bacterial load in the stomach before treatment, and genetic differences in how your liver processes the acid-suppressing medication all play roles. Some people metabolize these drugs so quickly that the medication never builds up to effective levels in the stomach.
But the factor you have the most control over is finishing the full course. Adherence is critically important, and side effects are the main reason people stop early. In one study, half of the patients who developed diarrhea during treatment were unable to complete the full regimen. Stopping early doesn’t just leave the infection in place; it can breed resistant bacteria that make the next attempt harder.
Side Effects During Treatment
The 14-day antibiotic course is not a pleasant experience for many people. The most commonly reported side effects include a metallic or altered taste (affecting about 18% of patients), abdominal or stomach pain (about 17%), and diarrhea (about 10%). Headache with or without vomiting occurs in roughly 4% of people. Less common complaints include nausea, dizziness, constipation, anxiety, and restlessness, each affecting fewer than 2%.
Adding a probiotic supplement during treatment may help with some of these issues. A meta-analysis found that probiotics reduced the overall incidence of side effects and cut the rate of diarrhea significantly. The strains most commonly studied include Lactobacillus, Saccharomyces boulardii, and Bifidobacterium species. Probiotics also modestly improved cure rates, likely because people who feel better are more likely to finish their medications.
Confirming the Cure
You won’t know whether treatment worked based on symptoms alone. A follow-up test is needed, and timing matters. You should wait at least four weeks after finishing antibiotics and stop taking any acid-suppressing medication for at least two weeks before the test. Testing too early can produce a false negative, making it look like the infection is gone when it’s actually still present. The most common confirmation method is a urea breath test, which is noninvasive and takes only a few minutes.
Staying Clear After a Successful Cure
Once the bacteria are confirmed gone, reinfection is possible but not inevitable. The overall recurrence rate found in a large systematic review was about 13% per year, though this figure comes from a pediatric analysis and rates vary significantly by region. In developed countries with better sanitation, reinfection rates tend to be much lower, often in the range of 1% to 3% per year. The bacteria spread through contaminated water, food, and close person-to-person contact, so your environment and hygiene practices influence your long-term risk.
The distinction between reinfection (catching the bacteria again from an external source) and recrudescence (the original infection coming back because it wasn’t fully eliminated) is important. True reinfection after a confirmed cure is relatively uncommon in adults living in areas with clean water supplies. Most “recurrences” that happen within the first year are thought to be incomplete eradication rather than a new infection, which is another reason the confirmation test matters.