Final answer:
For a 66-year-old female with chest pressure and a history of hypertension and diabetes, the best course of action is to administer oxygen, perform a focused exam, and transport her immediately to the hospital while avoiding giving medications not prescribed to her.
Step-by-step explanation:
A 66-year-old female with a history of hypertension and diabetes presents with substernal chest pressure of 2 hours' duration. Given her symptoms, which might suggest an acute cardiac event, the correct course of action would be to administer oxygen, perform a focused exam, and transport her to the hospital immediately. It is crucial to manage potential myocardial infarction (heart attack) quickly to minimize heart damage. Administering someone else's nitroglycerin without a prescription is not advised. A SAMPLE history (Symptoms, Allergies, Medications, Past medical history, Last oral intake, Events leading up to the illness or injury) can be taken en route if possible and safe to do so.