Drugs which affect the body chemistry to induce changes of mood may be marketed as legal or illegal. Their
classification has more to do with history and politics than the nature of the drugs themselves. Drugs are
commodities traded worldwide. As with any other commodity, their production is determined by their
profitability. The economies of countries such as Bolivia and Peru have become dependent on export earnings
from cocaine. Narcotics are a billion dollar business. Millions of people use drugs