How does colloidal bismuth pectin capsule work?

Colloidal Bismuth Pectin Capsule is a protective drug for gastrointestinal mucosa. It stimulates mucus secretion from gastric mucosa, separating digestive juice from gastric mucosa, thus reducing gastric acid and digestive juice damage to gastric mucosa. It can be used to treat digestive tract ulcers and has good effects on digestive tract ulcers associated with Helicobacter pylori. Bismuth Pectin contains bismuth substances, which may cause constipation to worsen.