A nurse is reviewing laboratory results for a client and notes a serum lithium level of 1.6 mEq/L. Which of the following manifestations should the nurse expect the client to report?

A. Fever and fluctuating blood pressure. While lithium toxicity can cause various systemic symptoms, fever and fluctuating blood pressure are not specifically indicative of lithium toxicity and may suggest other medical conditions. B. Blurred vision and jerking motor movements. A serum lithium level of 1.6 mEq/L indicates toxicity, and common manifestations of lithium toxicity include neurological symptoms such as blurred vision and involuntary movements, including tremors or jerking. C. Lip smacking and tongue thrusting. These symptoms are more characteristic of tardive dyskinesia or other extrapyramidal symptoms related to antipsychotic medications rather than lithium toxicity. D. GI discomfort and poor coordination. While gastrointestinal discomfort can occur with lithium toxicity, poor coordination is not as specific as the neurological symptoms like blurred vision and jerking movements. The latter are more closely associated with higher lithium levels.