Skip to content

ADD & ADHD Health Center

Select An Article

Glossary of ADHD Terms

    Font Size

    Below are the definitions of some common terms linked to ADHD.

    ADHD, Combined Type: Most common type of ADHD. People with this type show significant symptoms of inattention, hyperactivity, and impulsiveness.

    Recommended Related to ADD-ADHD

    ADHD and Stress

    Does ADHD  cause stress? Can stress cause ADHD? Is living with ADHD just a vicious cycle? How can the cycle be interrupted?  Whether you're looking for information about ADHD and stress for children, teens, or adults, you’ll find answers here.  

    Read the ADHD and Stress article > >

    ADHD, Predominantly Hyperactive-Impulsive Type: A subtype of ADHD in which people show both hyperactive and impulsive behavior, but may not show enough symptoms of inattention to qualify for Combined Type.

    ADHD, Predominantly Inattentive Type: People with this type of ADHD show significant symptoms of inattention but not hyperactive or impulsive behavior. This type of ADHD was formerly known as attention deficit disorder (ADD).

    Attention Deficit Hyperactivity Disorder (ADHD): A developmental and behavioral disorder that is characterized by levels of inattention, distractibility, hyperactivity, and impulsivity. Typically symptoms are inappropriate for a person's age or developmental level and cause problems in everyday life.

    Attention Deficit Disorder (ADD): A label with the same meaning as ADHD. At one time, ADD referred to a disorder involving difficulty paying attention or focusing attention without hyperactivity.

    Bipolar disorder: Mental condition that is marked by mood swings between periods of intense emotional highs and lows

    Clinical trial: Also called a research study; a research program involving patients with a particular condition usually to test various treatments for that condition

    Neural: Related to the nervous system.

    Neurotransmitter: A chemical in the brain that acts as a messenger to help transmit nerve impulses between brain cells.

    Nonstimulants: Medicines that are not stimulants that treat symptoms of ADHD. These include Intuniv, Kapvay, and Strattera.

    Psychostimulants or Stimulants: Medicines that help people with ADHD to focus their thoughts and ignore distractions. These include Adderall (amphetamine dextroamphetamine mixed salts), Concerta (methylphenidate extended-release), Daytrana (methylphenidate extended-release), Focalin (dexmethylphenidate), Ritalin (methylphenidate), Quillivant XR (methylphenidate extended-release), and Vyvanse (lisdexamphetamine).

    WebMD Medical Reference

    Reviewed by Smitha Bhandari, MD on October 08, 2014
    Next Article:

    Today on WebMD

    Post it notes
    Symptoms and treatments.
    Close up of eye
    What's zapping your focus?
    man driving car
    How to manage your impulses.
    Woman shopping for vitamins at drugstore
    Should you take them?
    concentration killers
    Woman taking a vitamin or supplement
    ADHD and Substance Abuse
    Reduce Side Effects ADHD Medications

    boy eating egg
    smiling man
    ADHD in Marriage and Romantic Relationships
    Adult man lying awake in bed

    WebMD Special Sections