The FDA’s decision to approve Talicia could have far-reaching impact, as this bug infects millions of American adults a year and is one of the strongest known causes of stomach cancer. Talicia is a three-drug combination of omeprazole, a proton pump inhibitor, amoxicillin, a penicillin-class antibacterial, and rifabutin, a rifamycin antibacterial. It is indicated for the treatment of H. pylori infection in adults.