■ From January 2011 through June 2011, an estimated 484,684 distinct drug cases were submitted to State and local laboratories in the United States and analyzed by September 30, 2011 . From these cases, an estimated 827,157 drug reports were identified .
■ Cannabis/THC was the most frequently reported drug (277,291), followed by cocaine (166,001), methamphetamine (78,889), and heroin (56,892) . The four most frequently reported drugs accounted for 70% of all drug reports .
■ Nationally, reports of oxycodone, hydrocodone, alprazolam, clonazepam, buprenorphine, and amphetamine increased significantly from the first half of 2001 through the first half of 2011 (p < .05) .
■ Regionally, reports of hydrocodone and clonazepam per 100,000 persons (aged 15 or older) increased significantly in all four U .S . census regions from the first six months of 2001 through the first six months of 2011 . Reports of oxycodone, alprazolam, and amphetamine per 100,000 persons increased significantly in the Midwest, Northeast, and South . Buprenorphine increased significantly in the West, Midwest, and Northeast .
■ More than 72% of narcotic analgesic reports were oxycodone or hydrocodone . Alprazolam accounted for 52% of tranquilizer and depressant reports . MDMA accounted for 32% of hallucinogen reports, and methamphetamine accounted for 83% of stimulant reports .
■ From the first half of 2001 through the first half of 2011, cannabis/THC reports per 100,000 persons increased significantly in the Northeast, but decreased significantly in the remaining three U .S . census regions . Cocaine reports decreased significantly in all U .S . census regions . During this same period, methamphetamine reports decreased significantly in the West and Midwest and
increased significantly in the South . Heroin reports increased significantly in the Midwest . MDMA
reports per 100,000 persons increased significantly in the Midwest, but decreased significantly in the South .
■ Cannabis/THC was the most frequently reported drug in the Midwest (45%), Northeast (34%), and South (30%), and methamphetamine was the most frequently reported drug in the
West (29%) .
■ Nationwide, cannabis/THC, cocaine, and methamphetamine reports exhibited significant decreasing trends between the first six months of 2001 and the first six months of 2011 .