Curare, a poison extracted from South America shrub, blocks the binding of Each by muscle cells. What do you suppose would happen to your muscles, including the ones involved in breathing, if a toxic dose of curare entered your bloodstream?

Curare if entered to the bloodstream can cause a lot of damages. Muscle paralysis could occur because of the blocking of acetylcholine (a neurotransmitter) and abnormal muscle's relaxation.

The respiratory muscles upon relaxation also cause respiratory paralysis that is extremely fatal and could cause death.