"This analysis confirms the predominant role opioid analgesics play in pharmaceutical overdose deaths, either alone or in combination with other drugs. It also, however, highlights the frequent involvement of drugs typically prescribed for mental health conditions such as benzodiazepines, antidepressants, and antipsychotics in overdose deaths. People with mental health disorders are at increased risk for heavy therapeutic use, nonmedical use, and overdose of opioids.4-6 Screening, identification, and appropriate management of such disorders is an important part of both behavioral health and chronic pain management."
Christopher M. Jones, PharmD, Karin A. Mack, PhD, and Leonard J. Paulozzi, MD, "Pharmaceutical Overdose Deaths, United States, 2010," Journal of the American Medical Association, February 20, 2013, Vol 309, No. 7, p. 659.