An<unk>  or anti-cholinesterase is a chemical that inhibits the cholinesterase enzyme from breaking down acetylcholine, so increasing both the level and duration of action of the neurotransmitter acetylcholine.
Acetylcholinesterase inhibitor
Nicotinic antagonist
Serotonin antagonist
Serotonin-norepinephrine reuptake inhibitor
Dopamine antagonist
Muscarinic antagonist
Dopamine agonist
Alpha-adrenergic agonist