Petrakis, MD, Robert Rosenheck, MD, Rani Desai, PhD 2010 185). Many Veterans Battle Substance Abuse” and drawn attention to associated violence and legal problems among returning troops (Ismene L. Petrakis, MD, Robert Rosenheck, MD, Rani Desai, PhD 2010 185). They also suggest that substance use disorders may disproportionally affect veterans from the current conflicts, and especially those veterans who also have psychological problems (Ismene L. Petrakis, MD, Robert Rosenheck, MD, Rani Desai, PhD 2010 185). However, actual rates of substance use disorders among veterans with PTSD and other mental illnesses are not well documented and there are limited data comparing veterans of recent conflicts with those of earlier wars (Ismene L. Petrakis, MD, Robert Rosenheck, MD, Rani Desai, PhD 2010 185). (1) there are high rates of substance use disorders among those with mental illness, ranging from 21–35% across major diagnostic groups; (2) the highest rates of comorbidity occur among those with bipolar disorder and schizophrenia; and (3) there are differences in rates of comorbidity in veterans of different war eras (Ismene L. Petrakis, MD, Robert Rosenheck, MD, Rani Desai, PhD 2010 188).…