A nurse is preparing to administer medication to a client who has gout. The nurse discovers that an error was made during the previous shift and the client received atenolol instead of allopurinol.Which of the following actions should the nurse take first when discovering a medication error in which atenolol was given instead of allopurinol to a client with gout?

The correct action for the nurse to take first in this situation is to obtain the client's blood pressure (Choice A). This is important because atenolol is a beta-blocker that can lower blood pressure, and giving it to a client with gout instead of allopurinol can potentially result in adverse effects or exacerbate the underlying condition. By obtaining the client's blood pressure, the nurse can assess if there have been any significant changes since the administration of the incorrect medication. This immediate assessment allows the nurse to monitor for any potential adverse effects and take appropriate action if necessary. Contacting the client's provider (Choice B) would be important, but assessing the immediate impact on the client's health by checking the blood pressure takes precedence. Informing the charge nurse (Choice C) and completing an incident report (Choice D) are important steps to take after addressing the immediate health concern of the client.