If it is determined that bad breath is caused by H. pylori, the symptoms can be relieved by simply removing the causative agent, which means that H. pylori clearance treatment is performed. There are two types of H. pylori clearance treatment options: 1. Triple therapy, which is mainly composed of two antibiotics plus an acid suppressant. Antibiotics are more commonly used such as amoxicillin, clarithromycin, metronidazole, levofloxacin, etc., from which two are selected for treatment. Due to drug resistance, amoxicillin plus another antibiotic is usually chosen. And acid suppressants are more commonly used such as omeprazole, pantoprazole, rabeprazole, lansoprazole, etc. 2. Quadruple therapy, adding a bismuth agent, such as bismuth gum, on top of triple therapy.