Antidote
There is a product called DuoDote that combines atropine with a medicine called pralidoxime chloride (also called 2-PAM).  Both medicines are antidotes against some insecticides and nerve gases.  DuoDote is given by injection (through a needle into the thigh muscle).  It comes in an auto-injector, which looks like a large pen.  When its safety cap is taken off and the auto-injector is pushed against the thigh, it will automatically send the needle into the thigh and deliver the medicines.  DuoDote is not carried on many ambulances, but some special teams that specialize in treating poisons carry them.