via chacha.com
About 1.2 million people age 12 to 17 smoked cigarettes, drank alcohol or used marijuana on any given day in 2006, according to The Office of Applied Studies (OAS) in the Substance Abuse and Mental Health Services Administration. In addition 49,000 adolescents used inhalants, 27,000 used hallucinogens (e.g., Ecstasy and other club drugs), 13,000 used cocaine, and 3,800 used heroin. Many parents and teachers are concerned about teen drug use and are trying to educate parents and teens about the harm that using drugs can do to still-growing bodies. One place to start is by understanding which drugs teens use the most.