Cocaine - Crack Cocaine
Cocaine and crack cocaine are powerfully addictive stimulants. People easily become addicted to its feelings of euphoria and increased stimulation of both body and mind. Cocaine is a strong central nervous system stimulant that increases levels of dopamine, a brain chemical associated with pleasure and movement, in the brain's reward circuit. Certain brain cells, or neurons, use dopamine to communicate. Normally, dopamine is released by a neuron in response to a pleasurable signal (e.g., the smell of good food), and then recycled back into the cell that released it, shutting off the signal between neurons.