Can You Have ADHD and Autism at the Same Time?
Short Answer
Yes, absolutely. Research shows that 30-50% of autistic people also have ADHD, and the co-occurrence is significantly higher than chance would predict (Rommelse et al., 2010). Both conditions involve atypical neurodevelopment, and they often co-occur because they share genetic and neurobiological overlap.
Full Answer
For decades, clinicians were taught that ADHD and autism were mutually exclusive diagnoses — you had one or the other. This was incorrect. Modern research has thoroughly established that ADHD and autism frequently co-occur, particularly in girls and women, and in autistic individuals with the inattentive ADHD presentation. Current diagnostic frameworks (DSM-5, ICD-11) explicitly allow for dual diagnosis, recognizing that the conditions are neurobiologically distinct but not mutually exclusive.
The conditions overlap in some ways and differ in others. Both ADHD and autism involve executive function challenges, emotional regulation difficulties, and social communication differences. However, autism is fundamentally a difference in sensory processing, social perception, and pattern recognition, while ADHD is primarily a regulation disorder affecting attention, impulse control, and motivation. An autistic person with ADHD might struggle with sensory overload (autism) *and* task initiation (ADHD). They might have intense special interests (autism) *and* struggle to maintain focus on non-preferred tasks due to motivation dysregulation (ADHD).
Identifying co-occurring ADHD in autistic individuals is clinically important because it changes management: an autistic person with ADHD typically benefits from both sensory accommodations (for autism) and often medication (for ADHD). Autism-only treatment may address sensory and social needs but leave executive dysfunction untreated. Similarly, ADHD treatment without autism recognition might miss crucial sensory and social support needs. If you're autistic and suspect ADHD, or vice versa, screening tools calibrated for co-occurrence (like our Neurodivergence Profile, which assesses both ADHD and autism traits) can help clarify your profile. Important disclaimer: This screening tool is not a diagnosis. Only a qualified healthcare provider can diagnose ADHD and autism.
Find Out for Yourself
Take the free Neurodivergence Profile test — instant results, no signup required.
Take the Free Neurodivergence Profile TestRelated Questions
Is autism more common in people with ADHD, or ADHD more common in autistic people?▼
Both directions show significant overlap. Approximately 40-50% of autistic people also meet ADHD criteria, and about 20-30% of people with ADHD also meet autism criteria. Women and girls show higher co-occurrence rates than males.
How do I know if I have both ADHD and autism?▼
ADHD alone typically doesn't include sensory sensitivities, repetitive behaviors, literal language processing, or intense special interests — these are autism traits. Autism alone doesn't necessarily involve motivation dysregulation or time blindness. A comprehensive assessment covering both trait domains is most accurate.
Do ADHD and autism medications interact?▼
ADHD stimulant medications don't treat autism traits, but they're often safe to use alongside autism-related interventions. Some autistic people are more medication-sensitive, so dosing and monitoring differ from typical ADHD treatment.