The Nurse Is Providing Care for a Patient Who Is

The nurse is providing care for a patient who is at 32 weeks' gestation and is started on low-molecular heparin injections after developing a deep vein thrombosis. The patient asks the nurse, "Why do I need a shot? Why can't I take the blood clot medicine that my dad takes orally?" Which of the following responses by the nurse is best?

A) "Anything that is lipid-soluble, including warfarin (Coumadin) , is able to cross the placental barrier. Heparin is not lipid-soluble, so it doesn't cross the barrier well."
B) "Medications by mouth easily cross the placenta while you are pregnant, but medications by other routes are not absorbed."
C) "Only water-soluble substances, such as vitamins, can cross the placental barrier, so you could take either medication, but heparin is less expensive."
D) "They are the same medication, but the shot is absorbed faster than the pill, so the doctor wants you to take daily shots."