I have the same round pill, 44 over 458, scored with a line between the numbers, unscored on the other side. Light blue, slightly speckled with white. It is *not* Mucinex or MucasRelief. I found it in a bottle labelled Oxycode w/ acet. 5/325mg w/f Percocet. but I am not sure I can trust this completely, the piulls may have been switched.