The nurse is preparing to administer enoxaparin (Lovenox) to a client before hip replacement surgery. Which of the following conditions would prevent the nurse from administering this drug?

A. Enoxaparin is often used to treat or prevent DVT, so this would not prevent administration. B. A bleeding disorder is a contraindication for enoxaparin due to the increased risk of hemorrhage. C. A heart rate of 60 is within normal limits and does not contraindicate enoxaparin use. D. Enoxaparin is used to treat and prevent PE, so this condition would not prevent its administration.