I am pretty sure I have ADD (not hyperactivity) and pot was the worse drug for me it increased the ruminative negative thoughts for me. But I know others that told me of their increased abiilities to think. My friend used to smoke it on the way to school she said it made her concentrate better. Like most meds we all need a different cocktail and some don't work for some people. Pot seems like it has a variant composition as to where it is grown how it is processed and what is added to the mix...Quesera