And patients lie about what they're allergic to or when you ask them they have no idea. Last week I had someone tell me they needed me to call their ER doctor to change their prescription from Tylenol 3 (acetaminophen and codeine) to Norco (hydrocodone and acetaminophen) because they are allergic to tylenol. "It'll kill me! And I'm in so much pain I'm dying here!"  I also have had someone continue to take a medication they were obviously having an allergic reaction to because "I paid too damn much to throw it out."  You bet your ass I talk mad shit, they only way I get through my day without crying sometimes.