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Sequential Therapy versus Standard Triple-Drug Therapy for Helicobacter pylori Eradication. Annals of Internal Medicine. 2007 Apr;146(8):I-20.

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Summaries for Patients | 17 April 2007

Sequential Therapy versus Standard Triple-Drug Therapy for Helicobacter pylori Eradication FREE

The summary below is from the full report titled “Sequential Therapy versus Standard Triple-Drug Therapy for Helicobacter pylori Eradication. A Randomized Trial.” It is in the 17 April 2007 issue of Annals ofInternal Medicine (volume 146, pages 556-563). The authors are D. Vaira, A. Zullo, N. Vakil, L. Gatta, C. Ricci, F. Perna, C. Hassan, V. Bernabucci, A. Tampieri, and S. Morini.

Ann Intern Med. 2007;146(8):I-20. doi:10.7326/0003-4819-146-8-200704170-00002

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What is the problem and what is known about it so far?

Helicobacter pylori (H. pylori) is a common type of bacteria that usually infects people during childhood. In almost 50% of cases, the infection does not cause symptoms. However, some people with H. pylori infection eventually develop inflammation of the stomach (gastritis) or ulcers in the stomach or upper small intestine. Gastritis and ulcers cause abdominal pain and, sometimes, bleeding. Doctors often treat stomach pain and ulcers caused by H. pylori with a combination of several antibiotics that are given for several days. Treatment gets rid of H. pylori in most patients, but 15% to 30% of patients may have persistent infection despite treatment. In recent years, there has been increasing resistance to standard antibiotic treatments for H. pylori infection. This means that it is harder to get rid of H. pylori in some patients and that we need new treatment regimens.

Why did the researchers do this particular study?

To see whether giving 4 antibiotics in sequential order gets rid of H. pylori infection more often than does a standard regimen of 3 antibiotics.

Who was studied?

300 adults with H. pylori infection and stomach pain (dyspepsia) or peptic ulcers.

How was the study done?

Patients were randomly assigned to receive either a sequential regimen or a standard regimen (the standard regimen is approved by the U.S. Food and Drug Administration). The sequential regimen was pantoprazole, amoxicillin, and placebo for 5 days followed by pantoprazole, clarithromycin, and tinidazole for 5 days. The standard regimen was pantoprazole, clarithromycin, and amoxicillin for 10 days. Four and 8 weeks after treatment, all patients were checked for H. pylori infection with urea breath tests. If the results of both tests were negative, researchers concluded that the infection was cured or eradicated. They then compared cure rates between groups. During the study, researchers, doctors, and patients did not know which treatment each patient received.

What did the researchers find?

The cure rate of H. pylori infection was greater with the sequential regimen (91%) than with the standard treatment (78%). Both regimens caused a few side effects. About 5% of patients in each group had stomach discomfort and 3% to 5% had mild diarrhea.

What were the limitations of the study?

The sequential treatment included 1 more drug (tinidazole) than did the standard treatment. It is hard to know whether that drug or the sequential administration of the drugs led to improved outcomes. The study was conducted in Italy. Other countries may have different rates of resistance to particular antibiotics. The antibiotic regimens in this study might have varying success rates in countries that have different resistance patterns.

What are the implications of the study?

A 4-drug sequential regimen got rid of H. pylori infection more often than did a standard 3-drug regimen.

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Sequential Therapy versus Standard Triple-Drug Therapy for Helicobacter pylori Eradication FREE

What is the problem and what is known about it so far?

Why did the researchers do this particular study?

Who was studied?

How was the study done?

What did the researchers find?

What were the limitations of the study?

What are the implications of the study?

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Letters

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Summary for Patients

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