I have a red-eye, early am flight to catch at the airport. I bought some liquid imodium to take for peace of mind and to help prevent an accident. How far in advance should I take it? How quick does it work? How tactfully should I tell the airport screening people, or flight attend I need a bathroom NOW, fasten your seatbelts symbol be d4mned lol. My symptoms are real good right now (1 bm a day), but I want to be as prepared as I can. A old fears die hard