Many studies are done to decrease the risk of renal dysfunction after kidney transplantation. The commonly used practices aimed at preserving this transplanted organ are based on many studies and experiences. 140 patients are divided into four 35 groups. Group 1 received Furosemid and Mannitol (Control Group); Group 2 received renal dose dopamine (Dopamine Group); Group 3 received aminophylline (Aminophylline Group); Group 4 received hyperosmolar solution as force diuresis (Force Diuresis Group). Renal function indices (Urine Volume, Creatinine Clearance, Urine Sodium) evaluated post op. All data analyzed statistically by (ANOVA TEST, PEARSON CORRELATION). Increase in urine output, creatinine clearance, and decrease in serum creatinine were significantly different in the second and fourth groups (p<0.05, p<0.01 respectively). In conclusion, dopamine and Force diuresis provide acceptable and better renal function after renal transplantation in comparison with simple hydration and aminophlline.