Hi Ronda,
I worked in a field where we were randomly drug tested. I was worried about all the meds I take, and especially if I were to be drug tested while on IVs and prednisone. I was told by my CF doctor at the time, that no CF drugs would give any kind of a false positive on a drug screen so I needn't be worried.
I can't speak for anything diabetes related, however, because I'm not diabetic. Sorry!
Hope that helped at all.
Autumn 34 w/cf