The problem is :- if you go to work with a headache or had shoulder reconstruction or some other medical problems that require you to take medicine you will test positive then you will be stood down till their medical doctor calls you and works out what has transpired previous to the test. No problem right?
Well this could take anywhere from 2 weeks to 2 months, what do you do in the mean time?
Drink chocalate milk before the test and you read a BAC ( this happened to me) now wait for approval to return to work.
How does piss off and let us get back to our job and stop wasting money on BS regulations that statistically cause >1% of incidences.
Dont start me on ASIC's
Rant over