it's not for me bro, i do dbol quite a bit and i've never experienced sleepiness from it. if i take too much, i don't get a restful night sleep, i know that. how much are you doing man?
always makes me tired too,,, but I still do not get a restfull night of sleep... If you look in many drug references, being lethargic is one of the listed SE.s for dbol..
Its is not uncommon to get sleepy from d-bol, especially naps or russsians but this lethargy should subside in three to five days. I don't know the scientific reason why you get sleepy but Im sure it is your body adjusting to the new foreign substance being introduced to it.