Recommendations from others
The Maastricht Consensus of the European Heliobacter Study Group1 recommends a 7-day triple regimen of PPI + clarithromycin + either metronidazole or amoxicillin or (if clarithromycin resistance is prevalent) PPI + amoxicillin 500 mg 3 times daily + metronidazole 500 mg 3 times daily.
The American College of Gastroenterology recommends 14-day therapy of one of the following options:8
- PPI + clarithromycin + (metronidazole or amoxicillin), or ranitidine bismuth citrate + clarithromycin + (metronidazole or amoxicillin). Tetracycline 500 mg twice a day can be substituted for amoxicillin or metronidazole
- PPI + bismuth subsalicylate 525 mg + metronidazole 500 mg 3 times daily + tetra-cycline 500 mg 4 times daily
- Bismuth subsalicylate 525 mg 4 times daily + metronidazole 250 mg 4 times daily + tetra-cycline 500 mg 4 times daily + H2 receptor antagonist in standard acid-suppression dose (eg, famotidine 20 mg twice a day for 4 weeks).
The Institute for Clinical Systems Improvement recommends as first-choice treatment a 7-day PPI/clarithromycin/amoxicillin combination, and as second choice a 7-day regimen of PPI, tetracycline 250 mg 4 times daily, metronidazole 500 mg twice daily, and bismuth subsalicylate 525 mg 4 times daily.9
Patients beginning complex regimens require counseling
Laura B. Hansen, PharmD, BCPS
University of Colorado Health Sciences Center, Denver, Colorado
The most effective regimens (>80% eradication) for H pylori include a 10- to 14-day course of at least 2 antibiotics and an antisecretory agent. However, even optimal treatment regimens can fail in approximately 10% of patients. Poor compliance is among the most common reasons for treatment failure. Medication side effects can affect up to 50% of patients taking triple-agent regimens.
Treatment regimens with multiple medications administered several times daily can be difficult to follow. Convenient packaging containing all daily medications are available to optimize adherence.
Counseling points for patients should include how to take the medicine correctly, expected side effects, the importance of completing the entire therapy regimen, and warnings of specific interactions (eg, alcohol and metronidazole). Lastly, the patient should be made aware of the cost of the entire regimen, which ranges from $50 to $250.