Question

what is nexium classified as? h₂-blocker gastric mucosal agent proton pump inhibitor antacid

Explanation:

Nexium (esomeprazole) is known to be a proton pump inhibitor, which works by reducing the amount of acid produced in the stomach. H₂ - blockers, gastric mucosal agents, and antacids have different mechanisms of action and are not the classification for Nexium.

Answer:

Proton pump inhibitor