The present study is designed to evaluate the concentration of Testosterone, Creatinine, Urea urea, and alkaline phosphatase levels in patients with benign prostatic hyperplasia. This study was conducted for the period from the beginning of October 2023 to the end of February 2024 at Kirkuk Hospital. General and specialized medical clinics in the city of Kirkuk. The study included (70) males with benign prostatic hyperplasia, ages (45-75) years, and average weight (82) kg. In addition to 20 samples of healthy people with the same rate of ages and weights of patients, study samples were distributed as follows: The first group: the control group and included (20) healthy males, and the second group: the patient group and distributed to three groups according to the age groups first category ( 45-55) years and included 25 patients, the second age group (56-65) years and included 20 patients, the third age group (66-75) years and included 25 patients. The results of the current study showed a significant increase (p ≤ 0.05) in the concentration of urea, creatinine and alkaline phosphatase enzyme in patients with benign prostatic hyperplasia compared to healthy people, and the current study showed a significant decrease (P ≤ 0.05) in testosterone concentration in patients with benign prostatic hyperplasia compared to healthy people. According to age groups, the results showed no significant differences (p ≤ 0.05) in the concentrations of urea, creatinine and alkaline phosphatase enzyme in patients with prostatic hyperplasia, and the results showed a significant decrease (p≤ 0.05) in the concentration of testosterone according to the age groups of patients with benign prostatic hyperplasia.