What is the first-line regimen for H. pylori–related peptic ulcer disease in a patient without penicillin allergy?

What is the first-line regimen for H. pylori–related peptic ulcer disease in a patient without penicillin allergy?

• A. Metronidazole alone
• B. Clarithromycin, amoxicillin, and a proton pump inhibitor
• C. Tetracycline and rifampin
• D. NSAIDs alone

Answer: (B)

Eradicating Helicobacter pylori is essential to heal the peptic ulcer and prevent recurrence. The first-line approach for a patient without penicillin allergy is a three-drug regimen that includes a proton pump inhibitor plus two antibiotics: clarithromycin and amoxicillin, typically for 10 to 14 days. The proton pump inhibitor lowers stomach acidity, which helps both ulcer healing and allows the antibiotics to work more effectively against the bacteria. Amoxicillin disrupts the bacterial cell wall, while clarithromycin inhibits protein synthesis, giving a synergistic effect that improves eradication rates. Other options don’t fit as first-line therapy. Metronidazole alone is not sufficient to eradicate H. pylori. A tetracycline–rifampin combination is not a standard initial regimen for H. pylori infection. And NSAIDs alone do not address the infection and can worsen ulcers. If local resistance patterns or allergies require adjustments, alternative regimens—such as quadruple therapy—may be used, but the described triple therapy is the typical first-line choice in the absence of penicillin allergy.

Eradicating Helicobacter pylori is essential to heal the peptic ulcer and prevent recurrence. The first-line approach for a patient without penicillin allergy is a three-drug regimen that includes a proton pump inhibitor plus two antibiotics: clarithromycin and amoxicillin, typically for 10 to 14 days. The proton pump inhibitor lowers stomach acidity, which helps both ulcer healing and allows the antibiotics to work more effectively against the bacteria. Amoxicillin disrupts the bacterial cell wall, while clarithromycin inhibits protein synthesis, giving a synergistic effect that improves eradication rates.

Other options don’t fit as first-line therapy. Metronidazole alone is not sufficient to eradicate H. pylori. A tetracycline–rifampin combination is not a standard initial regimen for H. pylori infection. And NSAIDs alone do not address the infection and can worsen ulcers. If local resistance patterns or allergies require adjustments, alternative regimens—such as quadruple therapy—may be used, but the described triple therapy is the typical first-line choice in the absence of penicillin allergy.