What are the four medications in the quadruple therapy for Helicobacter pylori, and how should they be taken?

The treatment for Helicobacter pylori infection usually employs a quadruple therapy regimen. The four medications typically include one proton pump inhibitor, one bismuth-containing agent, and two antibiotics. Commonly used medications by doctors include omeprazole enteric-coated capsules, colloidal bismuth pectin capsules, amoxicillin capsules, clarithromycin capsules, etc. Detailed explanations are as follows:

1. Proton pump inhibitors: Commonly used proton pump inhibitors include omeprazole enteric-coated capsules, rabeprazole sodium enteric-coated tablets, lansoprazole enteric-coated tablets, etc. These medications work by reducing gastric acid secretion, thereby enhancing the effectiveness of antibiotics. Proton pump inhibitors are usually taken 0.5 to 1 hour before meals.

2. Bismuth-containing agents: Commonly used bismuth agents include colloidal bismuth pectin capsules and bismuth potassium citrate capsules. Bismuth agents are primarily used to protect the gastric mucosa and also have certain bactericidal effects. They are usually taken about half an hour before meals or at a different time than the proton pump inhibitor. However, taking bismuth agents may cause black stools and a metallic taste in the mouth.

3. First antibiotic: One of the commonly used antibiotics is amoxicillin capsules, primarily used to kill Helicobacter pylori. Taking amoxicillin capsules after meals can reduce gastrointestinal irritation.

4. Second antibiotic: In addition to amoxicillin, another commonly used antibiotic is clarithromycin capsules. Depending on the patient's allergy to penicillin, other antibiotics such as tinidazole tablets or metronidazole tablets may also be selected. These antibiotics act to inhibit or kill Helicobacter pylori. They are also recommended to be taken after meals.

Before taking the quadruple therapy medications, it is essential to consult a professional physician or pharmacist and strictly follow medical instructions. During the treatment period, patients should also pay attention to dietary adjustments and lifestyle improvements to promote disease recovery.