Cocaine is an alkaloid which is extracted from the leaves of the South American coca plant. 

Methylphenidate, sold under the brand name Ritalin, is a mild central nervous system stimulant ...

PCP, Phencyclidine, Angel Dust - history, description, addiction.

Oxycontin (Oxycodone), what is it? How dangerous is it? How detect it?

Using opiates repeatedly can cause a dependence on or addiction to opiates. 

What is methamphetamine? Short-Term Effects of Methamphetamine Abuse, Long-Term Effects of Methamphetamine Abuse.

In 1947 Methadone hit the United States intended for use in narcotic addiction.

MDMA (methylenedioxymethamphetamine) or Ecstasy is a very dangerous drug.

Amphetamines are a class of compounds that stimulate the nervous systems

Do you want to know more about Barbiturates and their effects?

It is some information about most common illegal drug, Marijuana.