A nurse is teaching a client who has a new prescription for lithium. Which of the following statements made by the client indicates an understanding of the teaching?

A. "I should notify my doctor if I have vomiting and diarrhea.": Vomiting and diarrhea can lead to dehydration and sodium loss, which increases the risk of lithium toxicity. Promptly notifying the healthcare provider allows for dose adjustment or additional monitoring to maintain safe serum levels. B. "I should avoid consuming food for at least an hour after I take my medication.": Lithium can be taken with or without food, and taking it with meals may actually help reduce gastrointestinal discomfort. Avoiding food is unnecessary and may worsen adherence or side effects. C. "I should restrict my fluid intake.": Restricting fluids can lead to dehydration, increasing the risk of lithium toxicity. Clients should maintain adequate hydration while on lithium therapy. D. "I can expect to lose weight while taking this medication.": Lithium therapy is more commonly associated with weight gain rather than weight loss. Expecting weight loss reflects a misunderstanding of potential side effects.