The nurse is caring for a client with atrial fibrillation who receives a prescription for warfarin. The international normalized ratio (INR) is 2.8. Which action should the nurse take?

Choice A Reason:

Contact the healthcare provider: Given the client’s history of anaphylactic reaction to penicillin, there is a potential risk of cross-reactivity with cephalexin, a cephalosporin. Although the risk of cross-reactivity is relatively low, it is still significant enough to warrant caution. Studies indicate that 1-4% of people with a true penicillin allergy may also react to cephalosporins. Therefore, the nurse should contact the healthcare provider to discuss alternative antibiotics or additional precautions.

Choice B Reason:

Give with prescribed antihistamine: While antihistamines can help manage mild allergic reactions, they are not sufficient to prevent or treat anaphylaxis. Anaphylactic reactions require immediate medical intervention, including epinephrine administration. Therefore, relying solely on antihistamines is not an appropriate or safe action in this scenario.

Choice C Reason:

Administer the medication as prescribed: Administering cephalexin without consulting the healthcare provider could put the client at risk of a severe allergic reaction. Given the client’s history of anaphylaxis to penicillin, it is crucial to verify the safety of cephalexin with the healthcare provider before administration.

Choice D Reason:

Monitor the client for a rash or hives: While monitoring for allergic reactions is essential, it should not be the primary action in this case. The priority is to prevent a potential severe allergic reaction by consulting the healthcare provider before administering the medication. Monitoring alone does not address the underlying risk of cross-reactivity.

Choice A reason: Withholding the scheduled dose and notifying the healthcare provider is the correct action because the client’s heart rate is significantly low at 48 beats per minute. Labetalol, a beta-blocker, can further reduce the heart rate, potentially leading to bradycardia or other cardiac complications. It is crucial to inform the healthcare provider to reassess the medication regimen and ensure the client’s safety.

Choice B reason: Administering the dose and monitoring the client’s blood pressure regularly is not advisable in this scenario. Although monitoring blood pressure is important, the primary concern here is the client’s low heart rate. Administering labetalol could exacerbate bradycardia, leading to severe complications.

Choice C reason: Assessing for orthostatic hypotension before administering the dose is a good practice but not the most critical action in this situation. The client’s low heart rate poses a more immediate risk than orthostatic hypotension. Therefore, withholding the medication and notifying the healthcare provider is a higher priority.

Choice D reason: Applying a telemetry monitor before administering the dose is useful for continuous cardiac monitoring, but it does not address the immediate concern of the client’s low heart rate. The priority should be to withhold the medication and consult the healthcare provider to prevent potential bradycardia.