Final answer:
The medication that inhibits gastric acid secretion among the choices is famotidine. It is an H₂ blocker that decreases the production of acid in the stomach and is used to treat peptic ulcer disease among other conditions.
Step-by-step explanation:
The nurse should inform the client that the medication which inhibits gastric acid secretion is famotidine. Famotidine is part of a class of medications known as H₂ blockers. These medications work by decreasing the amount of acid made in the stomach and are commonly used to treat conditions like peptic ulcer disease, gastroesophageal reflux disease (GERD), and other conditions where the stomach produces too much acid such as Zollinger-Ellison syndrome.
While other options mentioned, such as calcium carbonate and aluminum hydroxide, are antacids that neutralize stomach acid, they do not have the same inhibitory effect on acid secretion as famotidine does.