Bipolar Disorder vs. ADHD

Key Differences

Hearing voices that others don't
Bipolar Disorder: Common
ADHD: Not Characteristic
Explanation: Hearing voices is much more suggestive of bipolar disorder during severe mood episodes than of ADHD.
Strong beliefs that others don't share
Bipolar Disorder: Common
ADHD: Not Characteristic
Explanation: Unusual fixed beliefs are more likely to occur in bipolar disorder during intense episodes, whereas they are not a typical ADHD feature.
Unusually elevated mood or energy
Bipolar Disorder: Core
ADHD: Associated
Explanation: A noticeable episode of unusually high mood or energy points more toward bipolar disorder than ADHD-related restlessness or enthusiasm.
Persistent low mood
Bipolar Disorder: Core
ADHD: Associated
Explanation: Low mood that comes in significant depressive episodes is more central to bipolar disorder, while ADHD may involve secondary frustration or discouragement.
Difficulty filtering background noise
Bipolar Disorder: Associated
ADHD: Core
Explanation: Ongoing trouble filtering noise is more characteristic of ADHD-related attention and sensory processing difficulties than bipolar disorder.

Key Similarities

Symptom How it is similar
Impulsivity Both conditions can involve acting quickly without fully thinking through consequences, which can make them look similar from the outside.
Racing thoughts Both conditions can involve thoughts feeling fast, crowded, or hard to slow down.
Procrastination Both conditions can make it difficult to begin tasks even when the person wants or needs to do them.
Mental clutter / mind feels constantly busy Both conditions can involve a busy, overloaded mind that makes it hard to feel mentally settled.
Difficulty falling asleep Both conditions can interfere with settling down at night and getting to sleep.
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