This guide intends to educate clinicians and other stakeholders about the harms of using more than one substance and consideration for addressing concurrent substance use (CSU) and concurrent substance use disorders (CSUD).

This advisory defines attention deficit hyperactivity disorder in adults, and explains interactions with substance use disorders.

This resource guide equips mayors and other local public health officials with strategies and resources to shape community responses that promote mental health and substance use disorder recovery, and ensure that needed treatments and services are available.