H. pylori is cured with a combination of antibiotics and acid-reducing medication, taken together for 14 days. There is no single pill or natural remedy that reliably eliminates the infection. The specific combination your doctor prescribes depends on local antibiotic resistance patterns and whether you’ve been treated before.
First-Line Treatment for Most People
The most current guidelines from the American College of Gastroenterology (2024) recommend bismuth quadruple therapy as the preferred first treatment when antibiotic susceptibility is unknown. This regimen combines four medications: bismuth subsalicylate (the active ingredient in Pepto-Bismol), two different antibiotics, and an acid-suppressing drug. You take doses four times a day with meals and at bedtime for 14 days.
The reason this particular combination is now preferred over older options comes down to resistance. For years, a simpler three-drug regimen was the go-to choice, pairing an acid suppressor with two antibiotics. But H. pylori has developed widespread resistance to one of those antibiotics (clarithromycin) in many countries. Guidelines have long stated that this simpler triple therapy should only be used when local clarithromycin resistance is below 15%, and resistance rates now exceed that threshold in numerous regions worldwide. Bismuth quadruple therapy sidesteps this problem because it uses different antibiotics.
If you have no penicillin allergy, there are also newer alternatives being recommended as suitable first-line options, including regimens that use a different class of acid-blocking drug that suppresses stomach acid more completely.
Why the Full 14 Days Matter
H. pylori lives in the mucus lining of your stomach, which is one of the harshest environments in the body. The acid-suppressing medication raises your stomach’s pH so the antibiotics can actually work in that environment. Stopping early, even if you feel better, gives surviving bacteria a chance to repopulate and develop resistance, making the next round of treatment harder.
The regimen is demanding. You’re taking multiple pills several times a day, and side effects are common. Nausea, a metallic taste in your mouth, darkened stools (from the bismuth), and diarrhea are the most frequent complaints. These are uncomfortable but expected. The metallic taste and dark stools are harmless and disappear after treatment ends.
Reducing Side Effects With Probiotics
Adding a probiotic supplement during treatment can help. A large network meta-analysis found that probiotics reduce antibiotic-associated diarrhea and other gastrointestinal side effects during H. pylori therapy. They also improved treatment compliance, meaning people were more likely to finish the full course. Lactobacillus strains and multi-strain combinations performed best in the analysis. You can take these alongside your antibiotics, not as a replacement for them.
Beyond probiotics, eating small, bland meals and staying well-hydrated helps manage nausea. Avoiding alcohol during treatment is important because it interacts badly with certain antibiotics in the regimen and can worsen stomach irritation.
What Happens if the First Round Fails
Not every course of treatment works the first time. When the initial regimen doesn’t eliminate the infection, your doctor will switch to a different combination of antibiotics to avoid resistance. In some cases, antibiotic susceptibility testing (checking which drugs the bacteria respond to) can guide the next choice. The goal is to use antibiotics the bacteria haven’t been exposed to yet.
Newer salvage options include regimens built around different antibiotic classes. The key principle is never repeating the same failed combination, since the surviving bacteria are likely resistant to those specific drugs.
How You’ll Know It Worked
Finishing your medication is not the end of the process. You need a follow-up test to confirm the bacteria are actually gone. In general, you wait at least four weeks after finishing antibiotics before testing. If your treatment included bismuth subsalicylate or acid-suppressing medications, you may need to stop those up to two weeks before the follow-up test, since they can interfere with accuracy.
The most common follow-up tests are a breath test or a stool antigen test. Both detect active infection without requiring an endoscopy. Stool antigen testing has a sensitivity of about 83%, meaning it catches most active infections but isn’t perfect. A breath test tends to be slightly more reliable for confirming eradication. Your doctor will choose based on availability and your situation. Skipping this confirmation step is a mistake, because you could still carry the infection without symptoms.
Why Natural Remedies Alone Don’t Work
If you’re searching for a cure, you’ve probably come across claims about mastic gum, manuka honey, broccoli sprouts, or green tea as H. pylori treatments. The clinical evidence for these is weak. In a randomized pilot study of mastic gum, only about 30 to 38 percent of patients who took mastic gum alone (at various doses) achieved eradication. When mastic gum was combined with just an acid suppressor and no antibiotics, zero patients cleared the infection. By comparison, standard antibiotic triple therapy in the same study eradicated H. pylori in roughly 77% of patients.
That’s a significant gap. Some natural compounds do show antibacterial activity against H. pylori in lab dishes, but the stomach is a very different environment than a petri dish. The bacteria burrow into the mucus layer where topical exposure to supplements is limited. There’s no natural remedy with an eradication rate anywhere close to standard antibiotic therapy.
This doesn’t mean supplements are useless during treatment. As noted above, probiotics can reduce side effects and help you finish the course. But they work as support, not as a standalone cure.
What to Expect During Recovery
Once H. pylori is confirmed eradicated, your stomach lining begins to heal. If you had gastritis or a small ulcer, symptoms like burning stomach pain, bloating, and nausea typically improve within a few weeks after the bacteria are gone. Ulcers can take several weeks to fully close, and your doctor may keep you on an acid-suppressing medication during that healing period.
Reinfection is possible but relatively uncommon in developed countries, occurring in roughly 1 to 3 percent of successfully treated adults per year. Practicing good hand hygiene and food safety reduces your risk, since H. pylori spreads through contaminated water, food, or direct contact with saliva or stool.