The Controlled Substances Act does not prevent physicians from being able to prescribe the drugs needed to perform assisted suicides under state law. Decided January 17, 2006 (argued October 5, 2005). Opinion of the Court: Anthony Kennedy → go there Dissenting: Scalia, Thomas. Topic: End of life. Gonzales v. Oregon, 546 U.S. 243 (2006), is a landmark decision of the US Supreme Court which ruled that the United States Attorney General cannot enforce the federal Controlled Substances Act against physicians who prescribed drugs, in compliance with Oregon state law, to terminally ill patients seeking to end their lives, commonly referred to as assisted suicide. It was the first major case heard by the Roberts Court under the new Chief Justice of the United States. Wiki link