Which blood test should be done periodically for a client on carbamazepine?

The most appropriate blood test to be done periodically for a client on carbamazepine is a complete blood cell (CBC) count. Carbamazepine can affect blood cell production and may lead to conditions such as leukopenia (low white blood cell count), thrombocytopenia (low platelet count), or aplastic anemia. Regular monitoring of the CBC allows healthcare providers to detect any adverse effects related to bone marrow suppression early, enabling timely intervention if any abnormalities are observed.

While liver function tests are important for many medications, carbamazepine primarily impacts blood cells rather than liver function. Serum bicarbonate levels and an electrolyte panel are also important tests but are not specifically indicated for monitoring the effects of carbamazepine. Thus, the periodic assessment of the CBC is crucial in managing safety and ensuring the patient's healthy blood cell levels while on this medication.