"Law enforcement officials in many areas of the country are reporting increasing use of synthetic cannabinoid products by teens and young adults as these products are widely available. Often hyped as a legal alternative to marijuana, individuals subject to scheduled or random drug screening tests allegedly also have used synthetic cannabinoid products to avoid a positive test for cannabis and the resulting consequences. Many synthetic cannabinoid users also abuse marijuana."
EWS Report 000006
United States Department of Justice: http://www.justice.gov/