Understanding ADHD and Bipolar Disorder TL;DR: Understanding ADHD vs. Bipolar Disorder ADHD (Attention-Deficit/Hyperactivity Disorder) and Bipolar Disorder (BD) are different conditions that can have some similar symptoms, like impulsivity and trouble focusing. However, they differ in several key ways: Symptoms: ADHD is characterized by consistent issues with attention, hyperactivity, and …