Calcium Channel Blocker (CCB) Poisoning

A 56-year-old female presents to the emergency department 6h after taking an overdose of verapamil MR 120mg x 28 capsules. She has a past medical history of hypertension and atrial flutter. On admission her GCS is 15, HR 50/min, BP 100/64, Capillary blood glucose (CBG) 10.2. ECG shows sinus bradycardia with prolongation of the PR interval. You estimate her weight to be 60kg.