Your client has been prescribed warfarin for the prevention of blood clots due to atrial fibrillation. Which statement by the client shows that the client understands their medication.

A. Bronchospasm: Non-selective beta-blockers inhibit beta-2 receptors located in the bronchial smooth muscle, leading to unintended constriction of the airways. This physiological response significantly increases airway resistance and can trigger acute respiratory distress in patients with underlying asthma or COPD. Clinicians must exercise extreme caution when prescribing these agents to individuals with reactive airway diseases.

B. Bradycardia: Beta-adrenoceptor antagonists decrease the firing rate of the sinoatrial node and slow conduction through the atrioventricular node. This negative chronotropic effect results in a reduced heart rate, which is a primary pharmacological action of the drug class. Excessive blockade can lead to symptomatic bradycardia, requiring a dose adjustment or discontinuation to maintain adequate cardiac output.

C. Hyperglycemia: Beta-blockers do not typically cause an elevation in blood glucose levels as a primary adverse effect. Instead, they are known to mask the sympathetic symptoms of hypoglycemia, such as tachycardia and tremors, which can be dangerous for diabetic patients. They may also slightly impair insulin release, but they are not categorized as hyper-glycemic agents.

D. Fatigue: The reduction in cardiac output and the blockade of peripheral beta-receptors often lead to a profound sense of lethargy or exercise intolerance. Patients frequently report feeling tired because the heart cannot increase its rate sufficiently to meet increased metabolic demands during physical activity. This is one of the most common reasons for patient non-compliance with beta-blocker therapy.

A. Assess the patient's appetite and thirst: While loop diuretics can cause dehydration, appetite monitoring is not the primary nursing priority for managing loop diuretic therapy. Thirst may occur, but it is a subjective symptom rather than a critical objective indicator of electrolyte imbalance. Clinical focus remains on metabolic and hemodynamic stability.

B. Monitor magnesium levels, as ordered: Loop diuretics inhibit the reabsorption of cations in the thick ascending limb of the loop of Henle. This mechanism leads to increased urinary excretion of magnesium alongside water and sodium. Hypomagnesemia can predispose the client to cardiac arrhythmias and muscle tetany.

C. Assess the client for gastric distress including nausea, vomiting and diarrhea: These gastrointestinal symptoms are not the most common or significant adverse effects of furosemide administration. While they can occur with many medications, they do not reflect the primary pharmacological risks associated with diuretic-induced fluid shifts. Monitoring should prioritize renal function and electrolyte concentrations.

D. Monitor the client's potassium levels as ordered: Furosemide promotes significant potassium wasting by increasing delivery of solutes to the distal tubule. Hypokalemia is a frequent and dangerous complication that can lead to life-threatening cardiac conduction disturbances. Frequent serum monitoring is essential to ensure the safety of the heart failure patient.