An adult client who is admitted to the mental health unit for treatment of bipolar disorder has a slightly slurred speech pattern and an unsteady gait. Which assessment finding is most important for the nurse to report to the health care provider?Reference RangeBlood alcohol level [Reference Range: 0 to 10.9 mmol/L (0% to 0.05%)]Lithium [Reference Range: 0.8 to 1.2 mEq/L or 0.8 to 1.2 mmol/L]