Which of the following should be monitored to ensure safety for a client on repaglinide?

Monitoring blood glucose levels is essential for a client on repaglinide because this medication is an oral hypoglycemic agent used to manage blood sugar levels in people with type 2 diabetes. Repaglinide stimulates the pancreas to release insulin in response to meals, thus helping to lower blood glucose levels. Ensuring that blood glucose levels are within the target range is crucial to prevent both hyperglycemia and hypoglycemia.

While blood pressure, liver function tests, and cholesterol levels are important to monitor in diabetic patients, they are not as directly relevant to the use of repaglinide. Blood pressure may be monitored for overall health, particularly if the patient has cardiovascular concerns or is on other medications that affect blood pressure. Liver function tests are relevant if there is a concern about liver health or if the patient is taking other medications that affect the liver. Cholesterol levels are important for assessing cardiovascular risk, which is often a concern in diabetic patients, but they do not have a direct relationship with the safety and efficacy of repaglinide. Therefore, blood glucose levels take precedence in this context to ensure the medication is effectively managing the patient's diabetes.