| Region 4 | ||||||||
| Adult Tertiary Drug of Abuse | ||||||||
| Source: IDHW Client Information System | ||||||||
| 1999-2000 | 2000-2001 | 2001-2002 | 2002-2003 | 2004-2005 | 2005-2006 | 2006-2007 | 2007-2008 | |
| Alcohol | 88 | 58 | 84 | 59 | 47 | 87 | 150 | 191 |
| Methamphetamines | 70 | 72 | 106 | 59 | 32 | 32 | 62 | 58 |
| Marijuana | 55 | 66 | 84 | 53 | 42 | 67 | 122 | 128 |
| Cocaine | 31 | 39 | 30 | 21 | 14 | 20 | 50 | 50 |
| Heroin | 6 | 10 | 11 | 6 | 3 | 7 | 14 | 19 |
| Other Compounds | 1999-2000 | 2000-2001 | 2001-2002 | 2002-2003 | 2004-2005 | 2005-2006 | 2006-2007 | 2007-2008 |
| Non-Rx Methadone | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| Other Opiates/Synth | 1 | 4 | 4 | 2 | 6 | 8 | 10 | 25 |
| PCP | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| Hallucinogens | 19 | 17 | 15 | 9 | 4 | 9 | 16 | 9 |
| Other Amphetamines | 5 | 1 | 0 | 1 | 0 | 1 | 6 | 4 |
| Other Inhalants | 1 | 1 | 2 | 2 | ||||
| Benzodiazpine | 1 | 1 | 0 | 0 | 2 | 1 | 3 | 5 |
| Other Tranquilizers | 0 | 0 | 2 | 1 | 1 | 0 | 1 | 0 |
| Barbituates | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 |
| Other Sedatives | 2 | 1 | 2 | 0 | 0 | 0 | 1 | 0 |
| Inhalants | 1 | 2 | 2 | 0 | 0 | 0 | 0 | 1 |
| Over-the-Counter | 1 | 1 | 0 | 0 | 1 | 2 | 2 | 1 |
| Other | 0 | 1 | 1 | 1 | 2 | 0 | 1 | 1 |
| None | 534 | 559 | 544 | 460 | 346 | 684 | 868 | 612 |