1) Neostigmine 2) Prostigmin 
See cholinesterase inhibitor
any of several drugs that prevent destruction of the neurotransmitter acetylcholine by the enzyme acetylcholinesterase within the nervous system. ... [3 related articles]
<pharmacology> An agent, such as nerve gas, that blocks nerve impulses by inhibiting the activity of the enzyme cholinesterase. ... (09 Oct 1997) ... 
(an″te-) (an″ti-ko″lin-es´tәr-ās) an agent that inhibits acetylcholinesterase, the enzyme that breaks down acetylcholine at junctions of cholinergic nerve endings and effector organs or postsynaptic neurons; this permits accumulation of acetylcholine and increases the stimul...
Type: Term Pronunciation: an′tē-kō-lin-es′ter-ās Definitions: 1. One of the drugs that inhibit or inactivate acetylcholinesterase, either reversibly (physostigmine) or irreversibly (tetraethyl pyrophosphate).
[n] - a medicine that inhibits cholinesterase by combining with it and so has a cholinergic effect
noun a medicine that inhibits cholinesterase by combining with it and so has a cholinergic effect
an enzyme or drug that blocks the action of acetylcholinesterase, thereby increasing the stimulating effect of acetylcholine on the muscles.