Hemodialysis is a filtering and cleaning process of endogenous and exogenous metabolic blood products. The level control of anticoagulants in patients with chronic renal disease is indispensable. Evidence of clotting as TTPa and evidence of activity of anti-factor Xa should be used as a substrate to protect these patients, undergoing dialysis. The Enoxaparin sodium is one that acts as antithrombin-factor Xa inhibitor of acting directly on the inactivation of antithrombin. Thus, small-chain molecules (low molecular weight) as Enoxaparin show fundamentally anti-Xa high end and low end antitrombotic. The purpose of this study was to evaluate safety, not inferiority clinical and pharmacodynamic profile of the drug Enoxaparin Sodium produced by laboratory Blausiegel when compared with Clexane product, produced by Laboratory Sanofi-Aventis in 60 patients with Chronic Renal Desease. The study was kind of parallel, randomized, double-blind and systematic sampling. The drugs were administered during 12 consecutive dialysis sessions at a dose of 1 mg / kg. The activity of the drugs was verified by the strength of markers TTPa and anti-Xa and security was seen through adverse reactions and the evaluation function of capillaries.