Flaps, so its easy, just admit to cough medicine (72hrs) and your in! Or maybe the screening process actually works, god forbid!
I concurr with the codeine, but would you not declare it before a medical?
If you are naive enough to do the medicine....should you be aircrew?
I believe flying and drugs dont mix, though for sure lots of people do it every day.
The bottom line? Book off, dont go for the interview...unless you are clean...