What exactly is ER grade morphine? I'm pretty sure all prescription morphine is of the same quality, though there is IV and pills morphine. But is that 10mg of hydrocodone in each one? That has to be a lot of acetaminophen at least to not be worth taking 5 at once. I never understood using acetaminophen as an abuse deterrent because they're gonna abuse it either way and it's much more harmful to make them take acetaminophen to get their fix than just let them get it.
EDIT:Also throwing up from a painkiller is pretty awful, though you can keep on doing whatever you're doing after.