The medication that can cause most fun(!) at airports is glyceryl trinatrate (GTN), a common substance used for the treatment of angina. The molecule is also known as nitro-glycerine, and is quite persistent after use. I have a couple of nursing and paramedic friends who have both had several positive hits by explosives detectors (four-legged and metal) over the years because they have given out GTN within 24 hours of flying. There is a quite amusing account from a paramedic in the USA at
dochazmat: Waterfront property at low tide if anyone is interested.
Last edited by peakcrew; 5th Sep 2013 at 22:32.
Reason: I've just found out that GTN and nitroglycerin are the same thing!