What are the UK guidelines for Helicobacter pylori treatment?

H. Pylori Treatment: UK Guidelines

In the UK, first-line treatment for H. pylori should be bismuth quadruple therapy for 14 days (PPI + bismuth + metronidazole + tetracycline), or concomitant non-bismuth quadruple therapy for 14 days (PPI + amoxicillin + metronidazole + clarithromycin) in areas of high clarithromycin resistance where bismuth is unavailable. 1

First-Line Treatment Algorithm

The UK follows the Maastricht V/Florence Consensus (European guidelines), which provides the most relevant guidance for British practice:

Primary Regimen Selection

• Bismuth Quadruple Therapy (14 days): 1

  • PPI (standard dose twice daily)
  • Bismuth subcitrate 120 mg (1 tablet) or bismuth subsalicylate 262 mg (2 tablets) four times daily
  • Metronidazole 400-500 mg three to four times daily
  • Tetracycline 500 mg four times daily
  • This is preferred because it works even with metronidazole-resistant strains and avoids clarithromycin overuse

• Concomitant Non-Bismuth Quadruple Therapy (14 days): 1

  • PPI (standard dose twice daily)
  • Amoxicillin 1000 mg twice daily
  • Metronidazole 500 mg twice daily
  • Clarithromycin 500 mg twice daily
  • Use this when bismuth is unavailable and clarithromycin resistance is high

Avoid Standard Triple Therapy

Do NOT use PPI-clarithromycin-amoxicillin triple therapy empirically - this should be abandoned when local clarithromycin resistance exceeds 15-20%, which is the case throughout most of the UK and Europe (resistance now >20% in Central, Western, and Southern Europe). 2

Treatment Duration

14 days is the recommended duration for all first-line therapies - this provides approximately 5% higher eradication rates compared to shorter courses. 1 The Maastricht guidelines allow 10 days only if this has been proven locally effective for quadruple therapies, but 14 days is safer for first attempts. 1

PPI Dosing

Use high-dose PPI (twice daily) to increase eradication success by 6-10%. 2 Standard twice-daily doses:

• Omeprazole 20 mg
• Lansoprazole 30 mg
• Esomeprazole 20 mg (or 40 mg for enhanced effect)
• Pantoprazole 40 mg
• Rabeprazole 20 mg

Penicillin Allergy

For true penicillin allergy, use bismuth quadruple therapy (preferred) or clarithromycin-metronidazole triple therapy only if from an area of low clarithromycin resistance. 1

Second-Line Treatment (After First Failure)

Never re-use clarithromycin or levofloxacin if previously exposed - resistance develops rapidly. 1

Choose between:

• Bismuth quadruple therapy (14 days) if not used first-line 1
• Levofloxacin triple therapy (14 days): 1
  • PPI twice daily
  • Amoxicillin 1000 mg twice daily
  • Levofloxacin 500 mg once daily or 250 mg twice daily
  • Use this if metronidazole was used first-line, but be aware of rising levofloxacin resistance

Third-Line Treatment (After Two Failures)

Culture with antibiotic susceptibility testing is strongly recommended at this stage, though availability is limited in the UK. 1, 3 Only 23% of UK laboratories perform H. pylori culture, and most process less than one specimen per week. 3

If susceptibility testing unavailable:

• Try the alternative second-line option not yet used
• Consider high-dose dual therapy (14 days): 1
  • Rabeprazole 20 mg four times daily
  • Amoxicillin 750 mg four times daily
• Rifabutin triple therapy (10 days) as third or fourth line: 1
  • PPI twice daily
  • Amoxicillin 1000 mg twice daily
  • Rifabutin 150 mg twice daily

Testing and Confirmation

All patients with bleeding peptic ulcer should undergo H. pylori testing and receive eradication therapy if positive. 4 The urea breath test is the most widely recommended non-invasive diagnostic method globally and in UK practice. 5, 6, 7

Test-of-cure is recommended for patients at increased risk of gastric cancer but not routinely for all patients after "test and treat" in primary care. 5

Common Pitfalls

• Don't use standard triple therapy empirically - clarithromycin resistance in the UK/Europe is too high (>20%)
• Don't use 7-day regimens - 14 days significantly improves success rates
• Don't re-use failed antibiotics - especially clarithromycin and levofloxacin
• Don't forget high-dose PPI - twice daily dosing is essential for optimal acid suppression
• Don't skip test-of-cure in high-risk patients - particularly those with family history of gastric cancer or from high-risk ethnic backgrounds

The British Society of Gastroenterology recommends that patients with functional dyspepsia should receive H. pylori "test and treat" as first-line management, with eradication therapy being highly efficacious though associated with more adverse events than control therapy. 5