A new report has just been published that provides an overview of synthetic drugs and the various bills that have been recently introduced to Congress. 

The report was prepared by the Congressional Research Service, which is a legislative branch within the Library of Congress and which provides policy and legal analysis to the members of Congress.   Please find this report attached here:  SyntheticDrug_2011.pdf

Synthetic Drugs: Overview and Issues for Congress

Lisa N. Sacco (Analyst in Illicit Drugs/Crime Policy); Kristin M. Finklea (Specialist in Domestic Security) Congressional Research Service; October 28, 2011