Medically reviewed by Michael MacIntyre, MD Substance use disorder (SUD) is a medical condition that affects the brain and behavior, making it difficult for a person to control their use of substances ...

Anxiety is more than just feeling worried. It can also have subtle effects on your body, mood, concentration, and sleep.

New research suggests that acute stress may impair key brain functions involved in managing emotions -- particularly in people living with 'distress disorders' such as depression, anxiety, and ...