Question 1 of 7Local anaesthetics · Pharmacology SBA Paper 1 · Q17
A 64-year-old woman has an indwelling lumbar epidural catheter following a total abdominal hysterectomy. She complains of incisional pain in the recovery bay. After administration of a 10 ml bolus of 0.25% levobupivacaine, she develops perioral tingling sensation and light-headedness. What is the most likely cause for the patient's symptoms?