Preparation of a Refludan solution with a concentration of 5 mg/ ml For intravenous. bolus injection a solution with a concentration of 5 mg/ ml is needed: – Reconstitute one vial (20 mg of lepirudin) with 0.4 ml of either water for injections or sodium chloride 9 mg/ ml (0.9%) solution. – The final concentration of 5 mg/ ml is obtained by transfer into a sterile, single-use syringe (of at least 5 ml capacity) and further dilution to a total volume of 4 ml using sodium chloride 9 mg/ ml (0.9%) or glucose 5% solution. – The final solution is to be administered in a body weight-dependent fashion.