A nurse in a mental health facility is collecting data from a client taking lithium. Which of the following information should the nurse report to the provider as an indication of lithium toxicity?

A. Dry cough: This is not typically associated with lithium toxicity and may indicate another issue, such as a respiratory infection. B. Elevated blood pressure: Lithium toxicity usually results in hypotension, not elevated blood pressure. C. Stooped posture: This is not a typical sign of lithium toxicity. D. Slurred speech: Slurred speech can be an early sign of lithium toxicity, indicating that the medication level is too high.