Skip to main contentLast updated: 27-Oct-2026
Dr Harsh Shah
MS, MCh (Surgical Gastroenterology), DrNB (Surgical Gastroenterology)
Registered with Gujarat Medical Council, Reg. No. G-38738
Gastro & Cancer Surgeon
Apollo Hospital, Bhat, Gandhinagar · Gota OPD, Ahmedabad · 18 years of experience
★★★★★ Google: 4.89 from 216 reviews (Gota clinic) · 4.94 from 18 reviews (Apollo, Bhat)
In short
H. pylori is cleared with four medicines taken together for two weeks. They are a strong acid tablet and two or three antibiotics. One antibiotic alone does not work.
The old three-medicine course fails more often now. In India, many doctors start with a four-medicine course that suits local resistance and your past tablets.
Finish every dose. Then repeat a test at least four weeks later, to prove that the germ has gone.
The full care plan for ulcers is on the peptic ulcer treatment in Ahmedabad page. This post explains the medicines that clear H. pylori, their side effects, and the test that shows the course worked.
No single tablet removes the germ. A course joins a strong acid tablet with two or more antibiotics. Your doctor picks the mix by where you live and what you have taken before.
| Course | What is in it | When it is chosen |
|---|---|---|
| Four medicines with bismuth | Acid tablet, bismuth, and two antibiotics (tetracycline and metronidazole) | Often the first choice in India, where resistance is high |
| Four medicines without bismuth | Acid tablet and three antibiotics (amoxicillin, clarithromycin, metronidazole) taken together | When bismuth is not available |
| Three medicines | Acid tablet and two antibiotics (amoxicillin, clarithromycin) | Only when the germ is known to respond to clarithromycin and you have never taken it |
| Newer acid blocker course | A stronger acid blocker (vonoprazan) with amoxicillin | Where the medicine is available and your doctor advises it |
Doses depend on your weight, kidneys, allergies and other tablets. Your doctor writes them for you. Do not copy a course from a friend, a chemist or a website.
Fourteen days clears the germ more reliably than seven or ten. The acid tablet is part of the treatment, not only a comfort. It helps the antibiotics work.
A shorter course is chosen only when your doctor knows it has been proven for that mix. Never shorten it yourself because the pain has gone.
Most people feel a little unwell on the course, and most finish it. Side effects are usually mild and pass when the course ends. Tell your doctor early if they are not mild.
| Medicine | What you may notice | What helps |
|---|---|---|
| Bismuth | Black stool and a dark tongue | Expected and harmless. If you also feel faint or vomit blood, go to an emergency department |
| Metronidazole | Metal taste, nausea | Take it after food. Avoid alcohol during the course and for three days after |
| Tetracycline | Upset stomach, sun sensitivity | Take it with a full glass of water and stay sitting up. It is not given in pregnancy |
| Amoxicillin or clarithromycin | Loose stools, bitter taste, rash | Tell your doctor about any rash or past penicillin allergy at once |
Set phone alarms for each dose. Missing one dose is not a disaster, but many missed doses can make the course fail. A failed course makes the next one harder, because the germ learns to resist.
Do not assume the germ has gone. A breath or stool test at least four weeks after the last antibiotic shows whether it worked. This test is part of the treatment.
After a bleeding ulcer, this check matters even more. The next steps are in what happens after an ulcer bleed or hole.
A failed course is common enough to plan for. The second course uses different antibiotics, never a repeat of the same mix.
The reasons an ulcer returns, and what is done when it will not heal, are covered on the peptic ulcer treatment page.
Clearing the germ stops the ulcer returning. Healing the sore that is already there takes acid tablets for some weeks and a change in habits.
Why the germ is so common in India, and who in the family should be tested, is explained in H. pylori is common in India: why do few get ulcers.
Most failed courses come down to a few habits. All of them are easy to avoid once you know them.
If your pain is new, or you are not sure it is an ulcer, start with stomach pain: is it an ulcer.
No. Pain fades in days, but the germ takes the full two weeks to clear. Stopping early lets the germ grow resistant and makes the next course harder.
No. Metronidazole can cause vomiting and a racing heart with alcohol. Avoid it during the course and for three days after.
One antibiotic alone fails, because the germ quickly resists it. Two or three together, with an acid tablet, give the course a far better chance.
Take the next dose on time and tell your doctor. Do not double up. Many missed doses can make the course fail.
Some of the medicines are not. Tell your doctor if you are pregnant or planning a baby. The course is usually put off until after delivery.
A breath or stool test at least four weeks after the last antibiotic shows it. Your doctor may ask you to pause acid tablets for two weeks before it.
The full range of care is on the peptic ulcer treatment page. For questions before you travel, call +91-63555-64601.
Shah’s Gastro, Cancer & Robotic Surgery Centre, Gota, Ahmedabad
Consultation, review of endoscopy, biopsy and scan reports, second opinions and follow-up.
Apollo Hospital, Bhat, Gandhinagar
Apollo Hospital International Limited, GIDC Bhat Industrial Estate, Bhat, Gandhinagar. Endoscopy and biopsy, CT scans, surgery for stomach and duodenal disorders, and inpatient care.
A positive H. pylori test is the start of a two-week course of medicines. It is not a reason to panic. If you want a second opinion on your report or your prescription, send it ahead on WhatsApp. The plan that suits you is decided after examination. Call +91-63555-64601 Send your prescription before the visit
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