What should a nurse monitor closely when caring for a patient receiving medication for hypertension?

Monitoring heart rate and blood pressure is crucial when caring for a patient receiving medication for hypertension. These parameters are directly affected by antihypertensive medications, which aim to lower blood pressure. Regular assessment helps determine the medication's effectiveness and ensures the patient is not experiencing adverse effects, such as significant hypotension or bradycardia.

Additionally, tracking these vital signs allows for timely interventions if the patient exhibits abnormal readings, ensuring safe and effective management of their hypertension. This practice is vital in preventing complications like dizziness or fainting episodes due to lowered blood pressure and ensuring that the treatment plan remains appropriate based on the patient's response to the medication.

While other factors like weight changes can indicate fluid retention or response to medications, blood glucose levels may be more relevant for patients with diabetes, and monitoring electrolyte levels can be important for specific antihypertensive agents, the most immediate and critical parameters in the context given are heart rate and blood pressure.