hi piranna,
try it both ways, and see which way is best for YOU!!!
as your body adjusts to it, the sleepy effect willl probably go away too!
i think that people who are already on some type of AD's are used to these meds in their system, but for you, this is the first time you're trying this kind of medicine. so, your body is probably more sensitive to it.
i remember when i was on wellbutrin that i could not stand the agitation and anxiety of it (although it was very good for the libido

). unfortunately the agitation was so bad, i had to stop it. however, it may work wonders for you, piranna. just give it some time.
and if you have major probs with it, ring your doc. and ask her/him. that's probably the best way to put your mind at ease.
good luck and keep posting!!!