Which term describes the class of drugs that suppress gastric acid production by inhibiting the proton pump?

Which term describes the class of drugs that suppress gastric acid production by inhibiting the proton pump?

• A. H2 receptor blocker
• B. Antacid
• C. Prokinetic
• D. Gastric acid-pump inhibitor

Answer: (D)

The main idea is how acid production is shut down at the last step of secretion in the stomach. The proton pump, or H+/K+ ATPase, sits on the parietal cells and is the final driver of acid release. Drugs described as gastric acid-pump inhibitors—often called proton pump inhibitors—target this pump. They are prodrugs that become active in the acidic environment of the secretory canaliculi and permanently inactivate the pump by forming a covalent bond. Because new pumps must be made by the cell, acid secretion stays suppressed for around a day or more, making this class the most effective at lowering gastric acid production. In contrast, H2 receptor blockers reduce acid by blocking histamine from stimulating the parietal cells, but they don’t shut down the pump itself. Antacids simply neutralize existing acid in the stomach, not its production. Prokinetics improve motility and emptying but don’t directly suppress acid production. So the term that best fits the description is the gastric acid-pump inhibitor, i.e., the proton pump inhibitors.

The main idea is how acid production is shut down at the last step of secretion in the stomach. The proton pump, or H+/K+ ATPase, sits on the parietal cells and is the final driver of acid release. Drugs described as gastric acid-pump inhibitors—often called proton pump inhibitors—target this pump. They are prodrugs that become active in the acidic environment of the secretory canaliculi and permanently inactivate the pump by forming a covalent bond. Because new pumps must be made by the cell, acid secretion stays suppressed for around a day or more, making this class the most effective at lowering gastric acid production.

In contrast, H2 receptor blockers reduce acid by blocking histamine from stimulating the parietal cells, but they don’t shut down the pump itself. Antacids simply neutralize existing acid in the stomach, not its production. Prokinetics improve motility and emptying but don’t directly suppress acid production. So the term that best fits the description is the gastric acid-pump inhibitor, i.e., the proton pump inhibitors.