yes and since i didnt see anyone comment calling it this yet its called intrusive sleep the theory is when an adhd brain loses interest in something it disengages interest and searches for something else to do and sometimes that disengagement can be so abrupt the brain starts falling asleep and the person becomes sleepy or even falls asleep so essentially when adhd people get bored they can get sleepy to the point of falling asleep until something else engages the brain and wakes it back up its a condition thats hard to study because the conditions are hard to replicate in a lab envorinment and its often misdiagnosed as eeg negative narcolepsy seems like narcolepsy but all tests are negative  i always thought i got so sleepy in classrooms because the oxygen level got low at the end turns out my brain was just so bored i started getting tired