Helicobacter pylori is not very well treated. Clinical H. pylori is often given antibiotics such as clarithromycin, metronidazole, and amoxicillin capsules, which belong to the first-line class of antibiotics. The second-line class of antibiotics are levofloxacin and furazolidone, giving a choice of two of the H. pylori antibiotics. Then give a choice of one of PPI inhibitors, omeprazole, and rabeprazole. A bismuth agent is also added. Quadruple therapy is given for 2 weeks to eradicate H. pylori. For anti-H. pylori, H. pylori is currently very resistant to drugs, so antibiotics need to be chosen carefully, and if eradication is not effective, strain culture and drug sensitivity tests need to be performed to develop an individualized treatment plan.