Digoxin and furosemide were prescribed for a client with chronic heart failure, and the home health nurse is evaluating the client's self-care knowledge of these drugs. Which statement indicates that the client has a good understanding about the use of these drugs?

"I need to notify my healthcare provider if I lose my appetite or get nauseated."

"I should take my furosemide only if I have shortness of breath or swelling in my feet."

"I need to check my blood pressure three times a day."

"If I lose more than one pound in a week, I should hold my next dose of furosemide."