Differentiate between the definitions and symptoms of postprandial hypoglycemia and fasting hypoglycemia.
Postprandial hypoglycemia generally generates symptoms of adrenergic stimulation including diaphoresis, anxiety, irritability, palpitations, tremor, and hunger. Occurs 2 to 4 hours postprandially, occurs suddenly and generally subsides in 15 to 20 minutes. Caused by stimulation of epinephrine release. Postprandial hypoglycemia is often idiopathic but may be caused by: early diabetes, alcohol intake, postgastrectomy, renal failure, drugs such as salicylates, B-blockers, pentamidine.
Patients suffering from fasting hypoglycemia generally have symptoms of neuroglycopenia, including headache, mental dullness, and fatigue. If hypoglycemiais more severe, may progress to confusion, visual blurring, loss of consciousness, and seizures. Occurs with fasting greater than 4 hours. Possible causes are: Excess insulin including insulinoma, self-administered insulin/oral hypoglycemic agents (diabetic insulin overdose), Alcohol abuse and liver disease (decreased gluconeogenesis), Pituitary or adrenal insufficiency