Which lab test should be monitored for a client taking acarbose for type 2 diabetes mellitus?

Monitoring liver function tests for a client taking acarbose is essential because acarbose can affect liver enzymes. While acarbose is primarily used to manage blood glucose levels by inhibiting carbohydrate absorption in the intestines, it can occasionally lead to hepatotoxicity, particularly with long-term use. Therefore, regular assessment of liver function is recommended to detect any potential liver issues early on, ensuring patient safety and effective management of the medication.

In the context of the other options, while blood glucose levels and Hemoglobin A1C are important for managing diabetes, they are not specific to the monitoring of acarbose itself. Creatinine levels can be important for assessing kidney function, but this is not particularly relevant to the direct effects or side effects of acarbose. Hence, the focus on liver function tests aligns with the specific concerns related to this medication.