Sen. Chuck GrassleyCharles (Chuck) Ernest GrassleyOvernight Health Care: Lawsuit challenges Arkansas Medicaid work requirements | CVS program targets high-cost drugs | Google parent invests in ObamaCare startup Oscar Archivist rejects Democrats' demand for Kavanaugh documents Kavanaugh recommended against Clinton indictment in 1998: report MORE (R-Iowa) said Congress should do more to prevent the use of synthetic drugs.

“Congress and the Drug Enforcement Administration have to work hard to stay on top of synthetic drugs,” Grassley said. “The cynical makers of these drugs change one chemical to evade existing federal bans.”

Grassley, who will serve as chairman of the Senate Judiciary Committee next year, applauded the administration’s recent action to ban three more synthetic drugs. 

At the end of the year, Congress also passed a bill that would add synthetic steroids to the controlled substances list.