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Does risk of ADHD increase if a parent or sibling has it?

ANSWER

ADHD runs in families. Anywhere from one-third to one-half of parents with ADHD will have a child with the disorder. There are genetic characteristics that seem to be passed down.

If a parent has ADHD, a child has more than a 50% chance of having it. If an older sibling has it, a child has more than a 30% chance of developing the condition.

SOURCES:

CHADD: "What Causes ADHD?;" ”Causes and Brain Chemistry;” and “New Understandings of ADHD.”

The ADHD Genetic Research Study at the National Institutes of Health and the National Health Genome Research Institute: "General Information about ADHD" and “Attention Deficit Hyperactivity Disorder.”

Mayo Clinic: “Attention-deficit/hyperactivity disorder (ADHD) in children.”

Reviewed by Smitha Bhandari on June 7, 2019

SOURCES:

CHADD: "What Causes ADHD?;" ”Causes and Brain Chemistry;” and “New Understandings of ADHD.”

The ADHD Genetic Research Study at the National Institutes of Health and the National Health Genome Research Institute: "General Information about ADHD" and “Attention Deficit Hyperactivity Disorder.”

Mayo Clinic: “Attention-deficit/hyperactivity disorder (ADHD) in children.”

Reviewed by Smitha Bhandari on June 7, 2019

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Can problems during pregnancy increase risk of ADHD?

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