A nurse is providing discharge teaching to a client who has a new prescription for verapamil for angina. Which of the following instructions should the nurse include?

A. Verapamil can be taken with or without food, so it is not necessary to avoid taking it on an empty stomach. B. Limiting fluid intake is not necessary when taking verapamil unless there are specific medical conditions. C. Verapamil can cause constipation, so increasing dietary fiber helps prevent this side effect. D. Swelling of the ankles is a common side effect of verapamil, but it should be reported if it becomes severe or bothersome.