An Older Adult Male Patient with Long-Term Heart Failure Has

An older adult male patient with long-term heart failure has presented for an office visit.The nurse obtains information that he has recently begun taking St.John's wort.What results with the use of this herbal supplement?

A) Digoxin toxicity
B) Altered potassium electrolyte balance
C) Reduced therapeutic benefits of digoxin
D) Enhanced digoxin effectiveness without producing toxicity