Is it? Wasn't sure if it were prescription or OTC... but i was also thinking of it in terms of taking liquid on planes etc..e.g. for shorter trips I guess there's too much liquid or that it would be considered too suspicious for hand luggage. Usually I would only take hand luggage for week long trips. Just want to consider this stuff before I become dependent on it as it will matter if I have to keep taking breaks from it in future.Fluridil is nothing illegal and just an OTC (over the counter) product right? Don't see the problem