Before administering an IV medication, the LVN's priority action is to:

Rationale: A. Prime the IV tubing is incorrect because priming the tubing is an important preparatory step to remove air and ensure smooth infusion, but it does not address patient safety or confirm the correct medication. This step comes after verifying the order and client identity. B. Flush the IV catheter is incorrect because flushing is done before and after medication administration to ensure line patency and prevent incompatibilities, but it is secondary to confirming the right medication and patient. Flushing without verifying the order could result in administering the wrong drug. C. Assess lung sounds is incorrect because while lung assessment is important for overall monitoring and detecting complications of IV therapy (e.g., fluid overload), it is not the priority action immediately before giving any IV medication. D. Verify the medication order and client identity is correct. The first and most important action before administering IV medications is to ensure the “five rights” of medication administration: right patient, right drug, right dose, right route, and right time. This step prevents medication errors, protects patient safety, and is a core nursing responsibility.