ADHD and bipolar disorder can both involve distractibility, impulsivity, restlessness and changes in energy. They can also coexist. Because treatment choices differ, recognising the pattern over time matters more than matching a few isolated symptoms.
A key difference is the timeline
ADHD is a neurodevelopmental condition. Symptoms begin in childhood, persist across life and cause impairment in more than one setting, although their expression can change.
Bipolar disorder involves episodes of significant mood and activity change. Mania or hypomania is more than a productive or energetic day; it is a distinct change from the person’s usual state and may involve reduced need for sleep, unusually elevated or irritable mood, rapid speech, risk-taking or grandiosity.
Why self-diagnosis is unreliable here
Sleep loss, anxiety, trauma, substance use, medication effects and other conditions can complicate the picture. Online checklists cannot establish which condition is present or whether both are.
NICE advises that ADHD diagnosis should be made by an appropriately trained specialist using a full developmental, psychiatric and psychosocial assessment. Bipolar assessment also considers the duration, severity and consequences of mood episodes.
What to bring to an appointment
Do not start, stop or change prescribed medication based on an article. If you experience possible mania, severe depression, psychosis or immediate safety concerns, seek urgent professional help.
- A timeline of symptoms and major mood changes
- Information about childhood attention and behaviour
- Changes in sleep and whether you felt tired
- Medication, substance and family mental-health history
- Examples of impact across work, study, relationships and finances