It's a PITA (pain in the ass) but let's treat it!
Any PRN work is chore.
People use any excuse to put off PRN's.
Let's not be judgemental or puritanical and use this as an excuse not to give pain medication because it means we have to do even more work..
PAIN is considered to be the fifth vital sign. And for good reason.
Because in the past, pain was being neglected, and not being treated.