A 59-year-old male patient has summoned EMS for crushing chest pain. He states that he needs his nitroglycerin, but it is in his car in a nearby parking lot. A friend of the patient explains that he also takes nitroglycerin and hands you his bottle of nitroglycerin. The patient appears very ill, and he says that this chest pain is the worst he's ever experienced. Given the patient's condition, your best action would be to:

A) Administer the friend's nitroglycerin
B) Have the patient retrieve his nitroglycerin from the car
C) Ask the friend to get the patient's nitroglycerin from his car quickly
D) Administer his friend's nitroglycerin now, but retrieve patient's nitroglycerin bottle from his car so you have proof and verification that this medication was appropriate to administer

C) Ask the friend to get the patient's nitroglycerin from his car quickly