A 67-year-old male patient has chest pain. After you assist him with taking two of his nitroglycerin tablets, his chest pain remains 7 out of 10 and he is still diaphoretic. His vital signs are as follows: pulse, 72; respirations, 18 breaths/min and adequate; blood pressure, 82/60 mmHg; and SpO2, 97% on 2 lpm of oxygen. You should:
A) Administer a third nitroglycerin tablet
B) Increase the oxygen to 4 lpm
C) Administer half of a nitroglycerin tablet
D) Transfer the patient to the stretcher and begin transport
D) Transfer the patient to the stretcher and begin transport
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