A low serum potassium level is checked for with what medication?

A low serum potassium level is checked for with what medication?

• A. Amiodarone
• B. Digoxin
• C. Heparin
• D. Warfarin

Answer: (B)

Potassium monitoring is essential when a patient is on digoxin because low potassium levels increase the risk of digoxin toxicity. Digoxin works by inhibiting the Na+/K+ ATPase pump in cardiac cells. When potassium is low, more digoxin can bind to that pump, enhancing its effects on the heart and raising the chance of dangerous arrhythmias. Keeping serum potassium in the normal range helps prevent this toxicity and allows safer use of digoxin. The other medications listed do not have this specific, direct link between low potassium and toxicity, though they have their own lab and monitoring considerations (such as coagulation tests for anticoagulants or potential drug interactions).

Potassium monitoring is essential when a patient is on digoxin because low potassium levels increase the risk of digoxin toxicity. Digoxin works by inhibiting the Na+/K+ ATPase pump in cardiac cells. When potassium is low, more digoxin can bind to that pump, enhancing its effects on the heart and raising the chance of dangerous arrhythmias. Keeping serum potassium in the normal range helps prevent this toxicity and allows safer use of digoxin. The other medications listed do not have this specific, direct link between low potassium and toxicity, though they have their own lab and monitoring considerations (such as coagulation tests for anticoagulants or potential drug interactions).