Hypotension and Bradycardia
There are a relatively small number of toxins that commonly lead to hypotension and bradycardia. It is important to make a correct diagnosis, as these drugs are among the most lethal and have specific antidotes.
In addition there are a number of toxins that will occasionally lead to bradycardia and hypotension in very severe poisoning but which usually cause either tachycardia or no change to heart rate.
Features that help to differentiate between these drugs are: