 Tranexamic acid TXA is a synthetic analog of serin than reversibly inhibits fibrinolysis by blocking lysine union sites in the plasmin and plasminogen activator molecules. TXA has been used to reduce blood loss and the need for allogeneic blood transfusion in cardiac surgery and orthopedic surgical procedures but few studies have assessed the efficacy of this antifibrinolytic agent in urological endoscopic procedures. 