cocaine achieves its effect through the neurotransmitter...

dopamine and norepinephrine

Cocaine is a stimulant drug that affects the central nervous system. It works by blocking the reuptake of certain neurotransmitters in the brain, thereby increasing their availability. Specifically, cocaine blocks the reuptake of dopamine and norepinephrine, which are neurotransmitters associated with pleasure, movement, and the fight-or-flight response, respectively.