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?

Advise the pharmacy of the need to deliver a vial of heparin to the nursing unit immediately.

Request a prescription to change the route of administration and use the available heparin.

Calculate and administer the equivalent dose of the available low molecular weight heparin.

Dilute the available heparin in 250 mL of normal saline solution prior to IV administration.