A nurse is teaching a client who has bipolar disorder about lithium. Which of the following statements should the nurse include in the teaching?

A. Clients taking lithium should maintain adequate fluid intake (typically 2–3 liters/day) to prevent toxicity. Decreasing fluid intake can lead to increased lithium levels and toxicity. B. Vomiting and diarrhea can lead to dehydration and sodium loss, both of which increase the risk for lithium toxicity. Clients should be taught to report these symptoms immediately. C. Lithium may cause dry mouth, not increased salivation. D. Lithium is best taken with food to help reduce gastrointestinal upset, which is a common side effect.