"In my first position, a coworker signed off an expiration date checking checklist for several months in a row without actually completing the task. I became aware of it when they asked me why I was spending so much time on my section. They volunteered the information and said they only check it about once a quarter and look for dates three months in advance. I mentioned that medications may rotate in that they miss, and they said it wasn't necessary. I became concerned about patient safety and mentioned it to my manager. This coworker was upset with me and made working a little complicated for a few months, but the coworker eventually left the company."