A client is to receive Synthroid 25 mcg PO daily. Synthroid unit dose available is 0.05 mg/ tablet. How many tablets (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero)

A. Amiodarone: Amiodarone is a Class III antiarrhythmic that primarily works by blocking potassium channels, thereby prolonging repolarization and the action potential duration. It is used to manage various atrial and ventricular arrhythmias, including atrial fibrillation and ventricular tachycardia.

B. Digoxin: Digoxin is a cardiac glycoside that increases myocardial contractility and slows conduction through the AV node. It does not affect potassium channels directly but rather works by inhibiting the sodium-potassium ATPase pump.

C. Verapamil: Verapamil is a calcium channel blocker (Class IV antiarrhythmic) that slows conduction through the AV node and is used to treat supraventricular tachyarrhythmias and hypertension. It has no significant effect on potassium channels.

D. Carvedilol: Carvedilol is a non-selective beta-blocker with some alpha-blocking effects. It reduces heart rate and blood pressure but does not block potassium channels or have antiarrhythmic properties in that classification.

A. Blood pressure reading of 120/80: While a normal blood pressure is desirable, this value alone does not indicate improvement in fluid overload or pulmonary symptoms. It may remain normal even if respiratory status worsens or fails to improve.

B. Urine output 30 mL for one hour: Although urine output is an important measure of diuretic effectiveness, 30 mL/hr is the minimum acceptable rate, not necessarily a strong indicator of clinical improvement. More robust diuresis may be expected following IV furosemide.

C. Serum sodium level is 135 mEq/L (135–145): A normal sodium level reflects stable electrolyte status but does not directly indicate improvement in pulmonary congestion or dyspnea. Sodium may be affected by many factors unrelated to heart failure symptom relief.

D. Respiratory rate 16 per minute: A decrease in respiratory rate from 26 to 16 suggests improved oxygenation, reduced pulmonary congestion, and decreased work of breathing. It is the most direct and clinically relevant indicator of symptomatic improvement in this context.