Which of the following is not an adrenergic symptom of hypoglycaemia?

• A. Shakiness.
• B. Headache.
• C. Sweating.
• D. Tingling of mouth or fingers.

Answer: (B)

The key idea is that adrenergic symptoms come from the body's sympathetic response to falling blood sugar, while neuroglycopenic symptoms come from the brain not getting enough glucose. Shakiness and sweating are classic signs of sympathetic (adrenergic) activation during hypoglycemia. Tingling of the mouth or fingers can also accompany this autonomic response. Headache, however, reflects the brain’s energy shortage from low glucose and is a neuroglycopenic symptom, not a result of sympathetic activation. So headache is not an adrenergic symptom.