You are called to a residence for a 60-year-old male complaining of chest pain. he is alert and oriented to time, place, and person. his past medical history includes hypertension and high cholesterol. the patient presents with hives over the chest, stridor, a swollen tongue, and wheezing in the upper fields. he is breathing 24 times per minute and speaking in complete sentences. he denies any shortness of breath or respiratory distress. what should be your first action