ADHD (or ADD) is a common disorder that often persists into adulthood for one third to one half of people diagnosed with it. There are three types of ADHD: predominately hyperactive-impulse, predominantly inattentive, and combined type. The type of ADHD is based on the number of symptoms present in each category.

Clinical depression is a worsening of mood that causes impairment in academic, occupational, or social functioning. It can be severe and disabling, resulting in suicidal behaviors and hospitalization, or it can be mild and chronic (two years), resulting in mild impairments and unhappiness.

Sudden, intense periods of anxiety that strike out of the blue, featuring racing heart, excessive sweating, and a sense of losing control. People often mistakenly believe they are having a heart attack, and they seek emergency medical attention.

Excessive worry that is out of proportion to events and can cause insomnia, irritability, muscle tension, and inattention. Types of anxiety disorders include Generalized Anxiety, Social Anxiety, OCD, and Panic Disorder.

An Alcohol Use Disorder is problematic drinking characterized by loss of control, preoccupation, and failed efforts to reduce use. People with alcohol-related medical illnesses have more frequent hospitalizations and longer hospital stays compared with individuals without problematic drinking.

Difficulty going to sleep, staying asleep, and/or waking up too early. Negative daytime consequences occur in the form of fatigue, lack of concentration, and mood problems. Treatments can include medication, cognitive-behavioral therapy, and sleep hygiene.