Final answer:
Lansoprazole is a proton pump inhibitor that reduces the production of stomach acid, thereby helping gastric ulcers to heal by decreasing the irritation of ulcerated tissue caused by acidic gastric juice.
Step-by-step explanation:
Lansoprazole is a medication prescribed for the treatment of gastric ulcers by reducing the production of stomach acid. It belongs to a class of drugs known as proton pump inhibitors (PPIs).
Lansoprazole works by inhibiting the enzyme in the wall of the stomach that produces acid, thereby decreasing the amount of acid in the stomach.
This reduction in stomach acid allows ulcers to heal more effectively and reduces discomfort caused by excess stomach acid, such as a burning sensation or indigestion.
The mechanism is distinct from antacids, which neutralize existing stomach acid, and does not directly treat ulcers caused by the bacteria Helicobacter pylori, which would require antibiotic therapy.
When ulcers are caused by nonsteroidal anti-inflammatory drugs (NSAIDs), patients may be instructed to switch to a different class of pain relievers to allow their ulcers to heal.