Types of ADHD

Page last updated: 9/6/2021

There are three different types of ADHD, depending on which types of symptoms are strongest in the individual:

Combined Presentation. This, the most common type of ADHD, is characterized by impulsive and hyperactive behaviors as well as inattention and distractibility.
Predominantly Hyperactive-Impulsive Presentation. This, the least common type of ADHD, is characterized by impulsive and hyperactive behaviors without inattention and distractibility. The person fidgets and talks a lot. It is hard to sit still for long (e.g., for a meal or while doing homework). Smaller children may run, jump or climb constantly. The individual feels restless and has trouble with impulsivity. Someone who is impulsive may interrupt others a lot, grab things from people, or speak at inappropriate times. It is hard for the person to wait their turn or listen to directions. A person with impulsiveness may have more accidents and injuries than others.
Predominantly Inattentive Presentation. This type of ADHD is characterized predominately by inattention and distractibility without hyperactivity. It is hard for the individual to organize or finish a task, to pay attention to details, or to follow instructions or conversations. The person is easily distracted or forgets details of daily routines.

Because symptoms can change over time, the presentation may change over time as well.

Adapted from:

Types of ADHD: About