A client with reflux esophagitis reports relief of symptoms. The nurse instructs the client that symptom relief is most likely the result of which of the client's prescriptions?

Rationale: A. Lansoprazole: Lansoprazole is a proton pump inhibitor (PPI) that reduces gastric acid secretion, allowing healing of the esophageal lining and relief from heartburn and reflux symptoms. This makes it the most likely medication responsible for the client’s symptom improvement. B. Promethazine hydrochloride: Promethazine is an antihistamine with antiemetic and sedative properties. While it may reduce nausea, it does not directly decrease gastric acid production or treat reflux esophagitis. C. Celecoxib: Celecoxib is a COX-2 inhibitor used for pain and inflammation management, often in conditions like arthritis. It has no therapeutic effect on gastric acid suppression and may even contribute to gastrointestinal irritation. D. Clarithromycin: Clarithromycin is a macrolide antibiotic used to treat bacterial infections, including Helicobacter pylori when combined with other drugs. On its own, it does not relieve reflux esophagitis symptoms because it does not reduce gastric acid secretion.