skeptical_md

I am very sad to hear that your grandmother died as a result of a medical error, but the details of the story as you remember them aren’t quite plausible.

1) Metformin is not available in an IV formulation 2) Metformin itself is not nephrotoxic

It certainly is believable that a medical error caused kidney failure but it is very unlikely to have been caused by an incorrect second IV dose of Metformin.