The effects of Geumguesingitang and Dohongsamultang on rats with nephrosis induced by a single tail-intravenous injection of puromycin aminonucleoside(PAN), 2.5mg/l00g of body weight were evaluated in the present study. The effects of Geumguesingitang and Dohongsamultang on PAN nephrosis were evaluated by measuring (1)the concentrations of albumin, total protein, total lipid, cholesterol, triglyceride, creatinine, blood urea nitrogen(BUN) and uric acid in the serum, (2)the concentrations of protein, creatinine, glucose, occult blood and volume of the 24 hours urine and (3)the volume of intake water. The results are summerized as follows; 1. In the Control group as compared to the Normal. the amount of protein of 24 hours urine was significantly increased, the concentrations of albumin and total protein were significantly decreased. Total lipid, cholesterol and triglyceride in the serum were significantly increased. The concentrations of creatinine, BUN, uric acid in the serum, the amount of glucose and occult blood of 24 hours urine were also increased significantly. 2. In the Geumguesingitang group as compared to the Control, the increase in the amount of urinary protein during 24 hours induced by PAN was significantly suppressed, and the concentrations of total protein and albumin in the serum were significantly increased. The concentrations of total lipid, cholesterol and triglyceride in the serum were significantly inhibited. The decrease of the concentrations of creatinine and uric acid in the serum were also observed significantly. 3. In the Dohongsamultang group as compared to the Control, the increase of the amount of protein and glucose of the 24 hours urine induced by PAN were significantly inhibited, and the concentrations of total protein and albumin in the serum were increased significantly. The concentrations of total lipid, cholesterol and triglyceride in the serum were decreased significantly. The decrease of the concentrations of creatinine and uric acid in the serum were observed significantly. It can be inferred that Geumguesingitang has effects on improving proteinuria, hypoproteinemia effectively. It has an effect on hyperlipidemia significantly relieved. And relieving azotemia when nephrotic syndrome is accompanied by the acute renal failure. It can be inferred that Dohongsamultang improves hyperlipidemia effectively. It has effects on proteinuria, hypoproteinemia in nephrotic syndrome significantly relieved. And relieving azotemia when nephrotic syndrome is accompanied by the acute renal failure.