ACHEI
Acetylcholinesterase inhibitor. A drug that prevents acetylcholinesterase from "turning off" the activation of muscle triggered by Acetylcholine. Acetylcholine activates a muscle, acetylcholinesterase comes into play to "deactivate" it so the muscle can once again relax. Substances that inhibit that action include some snake venoms, nerve agents, and some pesticides.