A client has a prescription for heparin 1,000 units IV STAT. Several pre filled syringes of low molecular weight heparin are available in the client's medication drawer. Which action should the nurse implement?

A. Request a prescription to change the route of administration and use the available heparin: Low molecular weight heparin (LMWH) and unfractionated heparin (UFH) are not interchangeable. LMWH is usually administered subcutaneously, whereas UFH is administered intravenously for acute situations. Changing the route of administration without a new prescription would not be appropriate. B. Advise the pharmacy of the need to deliver a vial of heparin to the nursing unit immediately: Since the prescription is for intravenous heparin and the available syringes are of LMWH (which is not suitable for IV use), it is essential to contact the pharmacy to provide the correct formulation. Immediate action ensures that the client receives the correct medication promptly. C. Calculate and administer the equivalent dose of the available low molecular weight heparin: Calculating and administering LMWH instead of UFH is inappropriate because they are different types of heparin with different indications, dosing regimens, and routes of administration. Using LMWH for an IV prescription could result in ineffective treatment or complications. D. Dilute the available heparin in 250 mL of normal saline solution prior to IV administration: LMWH should not be diluted or used in place of UFH for IV administration. This action is incorrect because the available medication is not suitable for the prescribed route and dose. The proper medication needs to be obtained from the pharmacy.