A nurse is reinforcing teaching with a client who has a new prescription for sustained-release verapamil. Which of the following statements by the client indicates an understanding of the teaching?

A. Sitting upright after taking the medication is not a standard recommendation. B. Sustained-release verapamil tablets should not be crushed, chewed, or broken. Crushing a sustained- release tablet can disrupt the extended-release mechanism, leading to an immediate release of the entire dose, which can increase the risk of adverse effects and toxicity. C. While monitoring is essential for some medications, anemia is not a specific concern related to sustained-release verapamil. D. Verapamil has been reported to cause constipation as a side effect. This is one of the most commonly reported side effects of verapamil. It is suggested that this effect may be due to a delay in colonic transit.