There are 2 types of ADHD- hyperactive and inattentive
. Bipolar II is commonly misdiagnosed as ADHD
because many of the symptoms are the same like loss of concentration, memory, racing thoughts, etc. The key to distinguishing between the two is that, to warrant a diagnosis of ADHD, the symptoms must have been present in childhood. The ADHD-like symptoms of BPII begin at any time with the onset of the disorder.