However, am I not correct in thinking the medical questionaire specifically asks if one has ever taken any illegal substances?
If you are going to be so Pedantic about it then why not let that work in your favour?
How do you know what you took was actually illegal?
Did you have a sample analysed?
Could have been anything..You don't know for sure..
So technically you can't answer that question honestly by saying YES
If in doubt I would answer No and that isn't a lie..Because you don't know what is was you took..You might suspect it was illegal..but maybe it wasn't..Who knows for sure?
My advice would be to forget about it..It's a non issue really