There is evidence that some forms of ADHD are effectively just the brain falling asleep rapidly and then waking up. This form cam be attenuated with norepinephrine reuptake inhibitor alone. Presents with ADHD like symptoms. But it’s a new thing most likely. Called “Cognitive Disengagement Syndrome”.

For the record, since I am on a mix of concerta and effexor, effexor alone does nothing to alleviate my symptoms (at the 150mg dosage). Although for me the adhd medication is no problem. It is actually effexor that torments me, because I have extreme withdrawal symptoms if I go even one day without it.