What Are the 18 Symptoms of ADHD? The Official List

To reach a diagnosis, doctors use the DSM-5 manual, which lists 18 symptoms of ADHD. They're split into two groups: Inattention and Hyperactivity/Impulsivity.

Group 1: Inattention (9 Symptoms)

1. Fails to give close attention to details or makes careless mistakes.
2. Has difficulty sustaining attention in tasks or activities.
3. Doesn't seem to listen when spoken to directly (mind elsewhere).
4. Doesn't follow through on instructions and fails to finish tasks.
5. Has difficulty organizing tasks and activities.
6. Avoids or is reluctant to engage in tasks that require sustained mental effort.
7. Loses things necessary for tasks (keys, glasses, phone).
8. Is easily distracted by external stimuli.
9. Is forgetful in daily activities.

Group 2: Hyperactivity and Impulsivity (9 Symptoms)

10. Fidgets with hands or feet or squirms in their seat.
11. Leaves their seat in situations where remaining seated is expected.
12. Runs or climbs in inappropriate situations (in adults, restlessness).
13. Unable to engage in leisure activities quietly.
14. Is "on the go," acting as if "driven by a motor."
15. Talks excessively.
16. Blurts out an answer before a question has been completed.
17. Has difficulty waiting their turn (in lines, in traffic).
18. Interrupts or intrudes on others.

How Many Symptoms Are Needed for Diagnosis?

• Children: At least 6 symptoms from one of the groups.
• Adults (17+): At least 5 symptoms from one of the groups.
  On top of that, symptoms must have been present before age 12 and cause impairment in at least two settings (e.g., work and home).