The Attention Deficit Disorder Association (ADDA) is the world’s leading adult ADHD organization. We are an international non-profit – 501C – organization founded over twenty-five years ago to help adults with Attention Deficit/Hyperactivity Disorder (ADHD) lead better lives. Since its inception, ADDA has become the source for information and resources exclusively for and about adult ADHD. ADDA brings together scientific perspectives and the human experience to generate hope, awareness, empowerment and connections worldwide in the field of ADHD.

The American Psychological Association (APA) is the leading scientific and professional organization representing psychology in the United States, with more than 115,700 researchers, educators, clinicians, consultants and students as its members.

The Centers for Disease Control and Prevention (CDC) serves as the national focus for developing and applying disease prevention and control, environmental health, and health promotion and health education activities designed to improve the health of the people of the United States.

Children and Adults with Attention-Deficit/Hyperactivity Disorder (CHADD), is a national non-profit, tax-exempt [Section 501(c)(3)] organization providing education, advocacy and support for individuals with ADHD. In addition to our informative website, CHADD also publishes a variety of printed materials to keep members and professionals current on research advances, medications and treatments affecting individuals with ADHD. These materials include Attention magazine, Attention weekly, a free electronically mailed current events newsletter, as well as other publications of specific interest to educators, professionals and parents.

HelpGuide is your trusted guide to mental, emotional, and social wellness. We don’t accept advertising. All of our materials are freely available—and without any ads to get in the way. Our goal is to empower you with the knowledge and support you need to take charge of your life and make healthy choices.

The National Institute of Mental Health (NIMH) is the lead federal agency for research on mental disorders. NIMH is one of the 27 Institutes and Centers that make up the National Institutes of Health (NIH), the largest biomedical research agency in the world. NIH is part of the U.S. Department of Health and Human Services (HHS). NIMH offers authoritative information about mental disorders, a range of related topics, and the latest mental health research.