An EMT is on the scene of a 48-year-old male patient complaining of chest pain. He has nitroglycerin prescribed and available. After performing the primary and secondary assessments, the EMT contacts medical control and is ordered to assist the patient in taking his nitroglycerin. Carefully, the EMT performs the "five rights" and checks the expiration before administering the medication. The

patient states the medicine is not helping his pain. The patient also states he does not have a headache. Reassessment of the patient's vital signs shows no change in blood pressure. The EMT suspects the nitro is not working because the:

A) medication is expired. B) medication is not nitroglycerin.
C) medication was somehow rendered inert. D) EMT only gave one tablet instead of two.

C