A nurse is providing discharge teaching to a client who has a new prescription for spironolactone. Which of the following statements by the client indicates an understanding of the teaching?

The correct answer is A: "I will limit potassium-rich foods in my diet." This is the correct statement because spironolactone is a potassium-sparing diuretic, so limiting potassium-rich foods helps prevent hyperkalemia. Choice B is incorrect because spironolactone should be taken with food to enhance absorption and reduce stomach upset. Choice C is incorrect because salt substitutes often contain potassium, which can counteract the medication's effects. Choice D is incorrect because doubling up on medication can lead to overdose and adverse effects.