I never used it but I'd guess that the best way of knowing it is to do a previous test.
as there is probably not any scientific research paper of this kind ouf there, looking for this specific outcome of passing out..
I know it's off-topic but I'mma say it quickly: oh boy, as an insomniac, I envy those able to sleep too much. I know it's bad too, but it's probably better than living like a zombie with their head hurting and unable to do anything because of having 4 hours of sleep each night...
I though people generally stop this drug because of weight-gain. apparently that's not always the case...
it still has sedative properties at higher doses, the thing is that these higher doses trigger another mechanism in the brain that makes you more alert, and this second mechanism ends up counteracting the sedative effects a little bit, at least in theory.
but there was people out there claiming that they sleep better with 45mg than with 7,5 or 15mg.