| State | ||||||||
| Adult Primary Drug of Abuse | ||||||||
| Source: IDHW Client Information System | ||||||||
| Common Compounds | 1999-2000 | 2000-2001 | 2001-2002 | 2002-2003 | 2005 | 2006 | 2007 | 2008 |
| Alcohol | 2337 | 2916 | 3960 | 2244 | 2046 | 3042 | 2913 | 1831 |
| Methamphetamines | 1002 | 1278 | 1495 | 1198 | 1914 | 2875 | 3327 | 2776 |
| Marijuana | 764 | 963 | 1216 | 768 | 792 | 1219 | 1324 | 964 |
| Cocaine | 118 | 129 | 99 | 57 | 64 | 97 | 84 | 100 |
| Heroin | 94 | 77 | 66 | 35 | 51 | 74 | 99 | 106 |
| Other Compounds | 1999-2000 | 2000-2001 | 2001-2002 | 2002-2003 | 2005 | 2006 | 2007 | 2008 |
| Non-Rx Methadone | 4 | 2 | 3 | 4 | 61 | 8 | 12 | 13 |
| Other Opiates/Synth | 48 | 69 | 51 | 54 | 117 | 162 | 183 | 195 |
| PCP | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Hallucinogens | 6 | 11 | 8 | 4 | 17 | 15 | 9 | 7 |
| Other Amphetamines | 7 | 8 | 4 | 4 | 2 | 11 | 11 | 14 |
| Other Inhalants | 2 | 3 | 5 | 2 | ||||
| Benzodiazpine | 3 | 2 | 5 | 2 | 12 | 9 | 12 | 9 |
| Other Tranquilizers | 4 | 10 | 3 | 5 | 1 | 1 | 0 | 0 |
| Barbituates | 1 | 2 | 0 | 0 | 4 | 3 | 1 | 0 |
| Other Sedatives | 4 | 12 | 7 | 5 | 0 | 6 | 3 | 3 |
| Inhalants | 3 | 6 | 1 | 0 | 5 | 7 | 22 | 30 |
| Over-the-Counter | 1 | 2 | 2 | 3 | 1 | 3 | 5 | 5 |
| Other | 2 | 11 | 3 | 4 | 4 | 10 | 7 | 2 |
| None | 29 | 39 | 19 | 23 | 0 | 0 | 0 | 0 |