1. Definition Acute Renal Failure (ARF), also known as Acute Kidney Injury (AKI) , is a sudden and often reversible reduction in kidney function, resulting in the accumulation of metabolic waste products, dysregulation of fluid and electrolytes, and impaired acid-base balance. It may develop over hours or days and requires prompt identification and management. 2. Clinical Features / Signs and Symptoms Oliguria (urine output <400 mL/day) or anuria in severe cases Edema , especially around the ankles and eyes Nausea and vomiting due to accumulation of toxins Fatigue and malaise Shortness of breath , particularly if fluid overload occurs Hypertension due to fluid retention Confusion or altered mental status in uremia Raised serum creatinine and blood urea nitrogen (BUN) levels 3. Homeopathic Therapeutics 1. Apocynum Cannabinum Useful in cases where there is dropsical swelling with scanty urine . The patient often has no thirst , despite lar...