Which medication has shown to be most successful in suppressing gastric hypersecretions after significant small bowel resection?

Which medication has shown to be most successful in suppressing gastric hypersecretions after significant small bowel resection?

• A. Proton pump inhibitors
• B. Cholestyramine
• C. Loperamide
• D. Histamine-2 receptor antagonists

Answer: (A)

The key idea is that suppressing the final step of acid production yields the strongest and most durable control of gastric acid after extensive small-bowel resection. Proton pump inhibitors target the H+/K+-ATPase directly—the enzyme responsible for the final secretion of hydrogen ions into the stomach lumen. By irreversibly inhibiting this proton pump, they block acid production even if gastrin or other stimulants are trying to drive secretion, giving potent and sustained acid suppression. Histamine-2 receptor antagonists also reduce acid, but they are less potent and can lose effect over time; they can’t match the level of suppression that proton pump inhibitors achieve. Cholestyramine and loperamide don’t reduce gastric acid secretion at all—cholestyramine binds bile acids to help with bile-acid–related diarrhea, while loperamide slows intestinal transit.

The key idea is that suppressing the final step of acid production yields the strongest and most durable control of gastric acid after extensive small-bowel resection. Proton pump inhibitors target the H+/K+-ATPase directly—the enzyme responsible for the final secretion of hydrogen ions into the stomach lumen. By irreversibly inhibiting this proton pump, they block acid production even if gastrin or other stimulants are trying to drive secretion, giving potent and sustained acid suppression.

Histamine-2 receptor antagonists also reduce acid, but they are less potent and can lose effect over time; they can’t match the level of suppression that proton pump inhibitors achieve. Cholestyramine and loperamide don’t reduce gastric acid secretion at all—cholestyramine binds bile acids to help with bile-acid–related diarrhea, while loperamide slows intestinal transit.