When post-traumatic stress disorder is a concern, drug and alcohol abuse is, too. IAFF members are more at risk for substance abuse with co-occurring PTSD than the general population.When a person is diagnosed with an alcohol or substance use disorder, there are sometimes underlying mental issues that led to or contributed to the addiction. These are called co-occurring disorders, and it’s paramount that these disorders are treated concurrently with the addiction. Whether the diagnosis is PTSD, depression, anxiety or a personality disorder, co-occurring disorders can amplify the seriousness of drug or alcohol addiction. According to the Substance Abuse and Mental Health Services Administration, individuals with mental health disorders are more likely than people without mental health disorders to experience some level of drug or alcohol addiction.