Substance abuse or drug abuse is an adaptive pattern use of substances the use of the substances is not dependent. In drug abuse the drugs are not consumed for medical purposes. Drugs associated with abuse include Alcohol, cocaine, opoids, Methaqualone and many other drugs (Sloboda, 230). Consumption of most drugs is a criminal activity in most countries in the world. Some of the legal substances that people are not restricted however much they consume include alcohol, nicotine found in products like tobacco are legal though they are known to have adverse effects on human bodies. As per the UN estimates there are more than 50 million users of heroin and cocaine and other synthetic daily users worldwide (Gerstein and Green, 12).