Bart- What is considered medication? I've been wondering this because I always travel with a special anti-perspirant only available in liquid form, or else the faucets are going 24/7. While I only use it nightly, having it get lost in luggage would mean that, come morning, the problem starts all over again. Do I have documentation from my doctor? No, this is OTC, though the only place I've found selling it is in the UK, and getting a replacement takes about 2-3 weeks. It's a 30ml spray bottle, with a little pump at the top. How would one explain this at security, and would the screeners consider it part of my meds?