What is obtained from the plant Erythroxylum coca,and what are its effects on the human body?

(N/A) $1$. Coca alkaloids or cocaine is obtained from the coca plant,Erythroxylum coca,which is native to South America.
$2$. It is extracted from the dried leaves and young branches of the coca plant.
$3$. Cocaine interferes with the transport of the neurotransmitter dopamine in the brain.
$4$. Commonly known as 'coke' or 'crack',it is usually snorted.
$5$. It has a potent stimulating action on the central nervous system,producing a sense of euphoria and increased energy.
$6$. Excessive dosage of cocaine causes hallucinations,sleeplessness,and suppresses appetite.