My doctor gave me 2 mg of Xanax for a flight I had today. It did not work at all, and I was unable to board the flight. It did not relieve any anxiety or panic, and I was crying, no relief at all. I am currently at a hotel by the airport right now, with another flight to attempt tomorrow. It is not a long flight - only 4 hours, but I am deathly terrified. I have no more Xanax on me, but I have 2 whole bottles of 0.5 Klonopins. What amount would you recommend for a crazy flier? Please keep in mind 2 mg Xanax did not work. I was thinking 3-4 mg of Klonopin for tomorrow's flight. I do not drink or take any other pills. Help.