Table.

Treatment Regimens for Helicobacter pylori Infection

Regimen	Duration
Clarithromycin triple therapy PPI + clarithromycin (500 mg) + amoxicillin (1 g) or metronidazole (500 mg)	14 days
Bismuth quadruple therapy PPI + bismuth subsalicylate (300 mg) + tetracycline (500 mg) + metronidazole (500 mg)	10-14 days
Concomitant therapy PPI + clarithromycin (500 mg) + amoxicillin (1 g) + metronidazole (500 mg)	10-14 days
Sequential therapy PPI + amoxicillin (1 g) PPI + clarithromycin (500 mg) + metronidazole (500 mg)	5-7 days 5-7 days
Hybrid therapy PPI + amoxicillin (1 g) PPI + amoxicillin + clarithromycin (500 mg) + metronidazole (500 mg)	7 days 7 days
Levofloxacin triple therapy PPI + levofloxacin (500 mg) + amoxicillin (1 g)	10-14 days
LOAD therapy Omeprazole (20 mg) + levofloxacin (250 mg) + nitazoxanide (500 mg) + doxycycline (100 mg)	7-10 days

LOAD, levofloxacin, omeprazole, nitazoxanide, and doxycycline; PPI, proton pump inhibitor.