During report tonight the oncoming nurse told me tyl and vicodin cannot be admin w/in 4 hrs of each other. The order reads Tyl 650 mg 1 po q4/prn/pain and the vicodin order reads Vicodin 5/500 1 or 2 po prn q4/prn/pain. There is nothing in the MARS that says one must wait 4 hrs between doses. I took the vicodin order myself from the MD. He didn't mention anything about waiting. I am a new nurse and the oncoming has been a nurse forever. Is she correct? If so, why isn't it specified in any pt's MARS? I know there is a daily limit for acetiminophen (sp?) dosing. How much/d?