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ADHD UK – PERCENTAGE DIAGNOSED VS UNDIAGNOSED

Prescriptions information indicates that 8.2% of people who have ADHD are in receipt of ADHD medication. Research suggests between 55% and 62% of individuals who have an ADHD diagnosis are in receipt of ADHD medication. 8.2% have medication therefore suggests an Assessed percentage of around 15% and an undiagnosed percentage of 85%. As it is an extrapolation, we prefer to err on the side of caution and say “Over 80% undiagnosed” and “Over 2 million undiagnosed”.

have ADHD in the UK

%

individuals in England who have ADHD receiving a prescription

%

Research data on % with an ADHD Assessment and in receipt of medication (see below)

%

Undiagnosed. Percentage who have ADHD but don't formally know.

million people in the UK with ADHD but not diagnosed

“ADHD is only diagnosed when it is having a debilitating impact on your life. The over 2 million people who have ADHD and no diagnose are defacto struggling. A diagnosis, and the understanding and support that comes with it, could instead have them thriving. We need to increase access to ADHD Assessments in the UK to get people the help that can change their life”

Henry Shelford

CEO and Co-Founder, ADHD UK

Research data on percentage with an ADHD Assessment and in receipt of medication (see below)

56% of children in America (2003) with an ADHD diagnosis are in receipt of medication
62% Children in America (2019) with an ADHD diagnosis are in receipt of medication
62% of children in the UK (2020) with an ADHD diagnosis are in receipt of medication.
54% of adults in the UK (2011) with an ADHD diagnosis are in receipt of medication
55.6% of individuals (any age) in the UK (2014) in receipt of ADHD medication within one year of diagnosis

Last updated: 2nd February 2023