This experimental study examines the effect of the antioxidant drug "U-74389G" on rat model, particularly in an ischemia-reperfusion (IR) protocol. The effects of this molecule were biochemically studied using mean creatinine phosphokinase (CPK) levels in blood. Materials and Methods: Forty rats with a mean weight of 231.875 g were used in the study. CPK levels were measured at 60 min (groups A and C) and at 120 min of reperfusion (groups B and D); A and B were groups without U-74389G administration, but C and D were groups with U-74389G administration. Results: U-74389G administration significantly increased CPK levels by 35.34%+17.20% (p=0.0260). Reperfusion time nonsignificantly increased CPK levels by 13.17%+18.05% (p=0.4134). However, U-74389G administration and reperfusion time together non-significantly increased CPK levels by 18.52%+9.44% (p=0.0770). Conclusion: U-74389G administration significantly increased CPK levels for a short term; however, these levels could not be restored, and the restoration capacity increases along with reperfusion time.
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