Lasix-induced nephrotoxicity manifests in several ways. Decreased urine output (oliguria or anuria) is a primary indicator. Monitor creatinine and blood urea nitrogen (BUN) levels closely; rising levels signal impaired kidney function. Patients may experience electrolyte imbalances, specifically hypokalemia (low potassium), hyponatremia (low sodium), and hypomagnesemia (low magnesium). These imbalances can lead to muscle weakness, cardiac arrhythmias, and neurological symptoms.
Acute Kidney Injury
Acute kidney injury (AKI) is a serious complication. Look for signs such as rising serum creatinine, reduced glomerular filtration rate (GFR), and altered urine composition. Patients may present with fluid overload, edema, and hypertension. Prompt intervention is crucial to mitigate AKI’s severity.
Interstitial Nephritis
Interstitial nephritis, a less common but serious manifestation, involves inflammation of the kidney’s interstitium. This can cause fever, rash, and eosinophilia. Diagnosis relies on renal biopsy in some cases. Discontinuation of Lasix is usually necessary. Close monitoring of kidney function is vital.
