A male client with dementia is admitted to the emergency department (ED) because he accidentally self-administered several doses of diltiazem. Which intervention is most important for the nurse to implement?

A) Coronary artery disease: It is crucial to assess for a history of coronary artery disease (CAD) before administering sumatriptan, as the medication is a serotonin receptor agonist that can cause vasoconstriction of coronary arteries. This can increase the risk of serious cardiovascular events, such as heart attack or stroke, particularly in clients with preexisting CAD.

B) Seasonal allergic rhinitis: While seasonal allergic rhinitis may be a concern for other medications due to potential allergic reactions or interactions, it is not directly related to the administration of sumatriptan. This condition does not pose a significant risk with the use of sumatriptan.

C) Type 2 diabetes mellitus: Although type 2 diabetes mellitus is an important consideration in the overall health management of a client, it is not the most critical condition to assess before administering sumatriptan. However, if the client has diabetes with associated complications like cardiovascular disease, this would increase concern for using sumatriptan.

D) Irritable bowel syndrome: Irritable bowel syndrome (IBS) is a gastrointestinal disorder that typically does not influence the decision to administer sumatriptan. While IBS may affect a client’s comfort or medication regimen, it does not present the same immediate risks as coronary artery disease when using sumatriptan.

A) Administer the scheduled dose: Administering the scheduled dose of warfarin when the INR is 5.0 is not appropriate because this INR level is significantly elevated, indicating a high risk of bleeding. Warfarin dosing should be adjusted based on INR levels to prevent complications such as excessive bleeding.
B) Discontinue the warfarin schedule: Completely discontinuing warfarin may not be necessary unless there are additional factors or signs of bleeding. It is essential to take appropriate action based on the INR level, but discontinuation should be guided by further evaluation and healthcare provider recommendations.
C) Withhold warfarin for 24 hours: Withholding the dose of warfarin is the correct action when faced with an elevated INR of 5.0. This intervention is crucial to prevent potential bleeding complications while waiting for further evaluation and guidance from the healthcare provider regarding additional management, such as administration of vitamin K or other reversal agents.

D) Obtain another INR analysis immediately: While obtaining another INR analysis can be helpful in monitoring trends, it is not the immediate priority if the INR is already 5.0. The primary action should be to withhold the dose and consult with the healthcare provider to determine the appropriate next steps for managing the elevated INR and ensuring patient safety.