From the May 2011 Office of National Drug Control Policy (ONDCP) fact sheet: "The United States is dedicated to a comprehensive, balanced approach of prevention, treatment, and enforcement. This document provides information about ONDCP's efforts to prevent drug use and treat addiction. In FY 2012, the Obama Administration requests approximately $10.7 billion to support demand reduction. This includes a nearly 15 percent increase for prevention, and a 1 percent increase for treatment over the FY 2011 enacted level. The overall FY 2012 national drug budget request, including supply reduction, is $26.2 billion, an increase of $485.7 million over FY 2011."
White House: http://www.whitehouse.gov/