Highlights of results include: (1) admissions aged 21 or older in 2005 that were for alcohol only were more likely than admissions for alcohol plus a secondary drug to be White (68 versus 58 percent); (2) admissions aged 21 or older for alcohol only were more likely than admissions for alcohol plus a secondary drug to have been referred to treatment by the criminal justice system (41 versus 33 percent); and (3) admissions for alcohol only were more likely than admissions for alcohol plus a secondary drug to be first-time admissions (50 versus 39 percent ). In 2005, the National Survey on Drug Use and Health found that about 18.1 million Americans were dependent on or abused alcohol. Some of these people entered treatment. Their admissions can be monitored with the Treatment Episode Data Set (TEDS). In 2005, over one-third of all TEDS admissions (36 percent) were either aged 21 or older and reported alcohol as the primary substance of abuse. This report examines these admissions, comparing about 374,000 admissions where alcohol was the only substance of abuse with about 289,000 admissions that reported alcohol plus a secondary drug. 3 figures