DarkClaw 82

Forgive me if this has been discussed already. But I’m back on Scadrial (Band of Mourning Audiobook) and a thought semi-randomly hit me. So, if a person stays up for several days in a row, it can alter the brain chemistry and have adverse affects on their personality. If a Ferring stored up awakeness (or whatever its referred to as) and they tap it for several days at a time, does it have the same effect on them, or does it the stored up ability have secondary benefits that counteract this? I assume it does, but I could see this as a limitation that could intrigue Sanderson enough to have in place.