Final answer:
The most appropriate course of action would be to start an IV line, draw blood samples, and administer dextrose 50% to address the patient's unconsciousness and low blood glucose level.
Step-by-step explanation:
The most appropriate course of action in this scenario would be to start an intravenous line, draw blood samples, and administer one amp of dextrose 50 percent (D50).
Since the patient is an adult diabetic who was found unconscious, the patient is likely experiencing hypoglycemia, which is a low blood glucose level. Administering dextrose 50 percent intravenously will rapidly increase the patient's blood glucose levels, providing quick relief.
It is important to start an intravenous line and draw blood samples before administering dextrose, as this will enable medical professionals to confirm the patient's blood glucose level and determine the appropriate dosage of dextrose.