A 45-year-old male is brought into your resuscitation bay by EMS. He was found down, with empty prescription bottles for metoprolol, amlodipine and verapamil on his person. His heart rate is in the 30s and his blood pressure is 80s/40s. He is unresponsive but has palpable pulses. You intubate the patient, start IV fluids and give glucagon and calcium for the presumed beta-blocker and calcium-channel blocker overdose.