Backstory: We have a pt that is on quite a bit of a particularly strong/addictive narcotic that is an injectible. On the nights this nurse works with this pt, the pt receives the injectible at every possible opportunity, which is q2hrs. The nurse charts "severe pain" for this pt. Fine and dandy, except for no one else, (including myself) ever has to give this med to this pt at that frequency, on any shift. The routine order covers the pts discomfort well, as I assess for pain frequently, and the res is A&O and can tell me if pain relief is effective or not. It has come to light that action has been taken, including suspension of this nurses' license, for diverting the very same drug at another facility. Her license, including actions taken, are posted on the BON website. I can't prove anything, which brings me to, what do I do? I have been told this nurse will "disappear" for awhile and come back in a completely different mood, and has even showed the bruises on her hip to someone. That's all rumor, but I worry my pt is getting NS injections instead of the pain control she desperately needs, or at least less of what is ordered for her. Is there anything I can do? FYI: We drug test on site.