A nurse is reviewing the laboratory studies on a client receiving dantrolene sodium (Dantrium). Which laboratory test would identify an adverse effect associated with this medication?

Dantrolene sodium (Dantrium) is a muscle relaxant commonly used to treat conditions such as malignant hyperthermia and spasticity. One of the significant adverse effects associated with dantrolene is hepatotoxicity, which means it can affect the liver. Monitoring liver function is crucial while a patient is on this medication to detect any signs of liver damage early, as dantrolene has been associated with elevations in liver enzymes.

Liver function tests typically include measurements of enzymes such as ALT (alanine aminotransferase), AST (aspartate aminotransferase), alkaline phosphatase, and bilirubin levels. An increase in these values may indicate liver damage, allowing for prompt intervention if necessary.

Understanding this context highlights the importance of monitoring liver function tests for patients taking dantrolene, making it the correct laboratory test to identify potential adverse effects of the medication. The other laboratory tests listed can provide valuable information regarding kidney function and overall health, but they are not specifically focused on identifying adverse effects related to liver function, which is critical in this scenario.