Before administering an antibiotic that can cause nephrotoxicity, which laboratory value is most important for the practical nurse (PN) to review?

An antibiotic that can cause nephrotoxicity is an antibiotic that can damage the kidneys, which are the organs that filter the blood and remove waste products and excess fluid from the body. Some examples of nephrotoxic antibiotics are aminoglycosides, vancomycin, amphotericin B, and sulfonamides. Serum creatinine is a laboratory value that measures the amount of creatinine in the blood. Creatinine is a waste product that is produced by the breakdown of muscle tissue and is normally excreted by the kidneys. A high serum creatinine level indicates that the kidneys are not functioning properly and are unable to filter out the creatinine from the blood. Before administering an antibiotic that can cause nephrotoxicity, it is important for the practical nurse (PN) to review the serum creatinine level of the client, as it reflects the kidney function and the risk of nephrotoxicity. A normal serum creatinine level ranges from 0.6 to 1.2 mg/dL for men and 0.5 to 1.1 mg/dL for women. If the serum creatinine level is elevated, it may indicate that the client has impaired kidney function or is developing nephrotoxicity from the antibiotic. In this case, the PN should notify the primary healthcare provider and monitor the client for signs and symptoms of nephrotoxicity, such as decreased urine output, edema, hypertension, or electrolyte imbalances .