A nurse administered insulin lispro via subcutaneous injection. What action should the nurse perform next?

A. Identify the client using two identifiers: Client identification is a critical safety step prior to medication administration, not after the insulin has already been given. Performing this step post-administration does not enhance immediate safety or therapeutic monitoring. B. Verify the insulin dose with another nurse: Dose verification is an essential safety measure before administration, especially with high-alert medications like insulin. After administration, verifying the dose again does not prevent adverse events that could occur from an incorrect dose already given. C. Gently roll the vial between hands to mix: Mixing the insulin by rolling the vial is performed prior to drawing up the medication to ensure uniform concentration, not after injection. Post-administration rolling has no clinical benefit. D. Continue to monitor the client for hypoglycemia: Monitoring for hypoglycemia is critical after administering rapid-acting insulin like lispro. Insulin lowers blood glucose quickly, and clients are at risk for symptoms such as sweating, shakiness, confusion, or seizures, making vigilant post-administration observation essential.