My brother is a medic and he usually tells me about any incidents that happened at work when he comes home.
Once he told me that they picked up someone who was suffering from a really high heart rate. The other medic that my brother was working with almost accidentally gave the patient atropine instead of another drug that was supposed to help slow down his heart rate.
My brother noticed it and warned him at the last minute. He was telling me how that patient would have died, had the other medic given the atropine. This is definitely a drug that needs to be feared and used very, very cautiously.