One Pill Kills - Those that can be fatal even after just ingesting a small amount 1) CALCIUM CHANNEL BLOCKERS Cause delayed onset bradycardia, hypotension, conduction defects. They can also block insulin secretion. 2) TRICYCLIC ANTIDEPRESSANTS Block fast sodium channels leading to intraventricular conduction delay and seizures. 3) CHLOROQUINES Cause cardiac arrhythmias (QRS widening) and cinchoism. 4) OPIATES Cause coma and respiratory depression 5) SULFONYLUREAS Cause hypoglycaemia due to stimulation of insulin production. 6) BETA BLOCKERS Cause hypoglycemia due to blockage of glycogenolysis. 7) THEOPHYLLINE Cause seizures and SVT. 8) AMPHETAMINES Cause agitation, confusion, hyperthermia, and hypertension. Dr. Tessa Davis https://twitter.com/TessaRDavis #OnePill #Kills #Fatal #Pharmacology #Peds #Pediatrics #Toxicology #Lethal #List