A nurse accidentaly administers metformin instead of metoprolol to a client. Which of the following actions should the nurse take?

A. Monitor the client's thyroid function levels: Thyroid function is not affected by either metformin or metoprolol. Monitoring thyroid levels would not address the potential effects of this medication error. B. Obtain the client's HDL level: HDL levels relate to lipid metabolism and are not influenced by a single dose of metformin. This test would not help assess for adverse effects following the medication error. C. Check the client's glucose level: Metformin is an antidiabetic medication that lowers blood glucose levels. Administering it in error could cause hypoglycemia, so the nurse should promptly monitor the client’s blood glucose and assess for related symptoms. D. Collect the client's uric acid level: Uric acid levels are associated with gout and kidney function but are unrelated to metformin administration. Checking this level would not provide information relevant to the medication error.