Quote from SaltySarcasticSally
An MD gave an injection he ordered and wanted me to document it. I didn't see him drawing it up or administering it so I wasn't at all comfortable signing off on it and I declined to do so.
While I both draw up and administer the majority of meds that I give myself, sometimes a physician I'm working a case with (anesthesia) will draw/adminster the med. Since I'm right there seeing what s/he's doing and also knowing what meds I had stocked on my cart, I'm comfortable signing off if the physician doesn't (which they actually will most of the time). But I would never do that under the circumstances you described.
Something similar actually happened to me when I worked in the ER when I was a "newish" nurse. A not too polite physician told me to chart some med or other as adminstered to patient A. Since I hadn't even been in the room, I declined. He then tried to order me to do it (throwing in a mini-tantrum to boot). (No, thank you
Being that I'm a bit of a smart***, I asked him at that point if it wouldn't look unprofessional if the chart read "unknown medication administered to patient A by physician B at unknown dose, adminstered at unknown time, at unknown route/site, using unknown technique", (Signed, Nurse Snark) and that it would be better that he who was privy to all the details, charted it. (I wouldn't have responded to in such a rude manner, if this particular physician hadn't had a previous history of being quite obnoxious). And strangely enough, we got along just fine after that incident. Oh, well... People can be funny sometimes.