I get .5mg pills to fly because I can't stand flying. I have taken as many as 4(2mg) for a flight, with alcohol, and it doesn't do shit except when I land, I don't feel the flight was that long, but I know it doesn't make me tired. I have noticed however, it works better for my flight anxiety when I don't drink anything while taking it. I get a script for 15, and that usually lasts me 3 flights round trip.