Hi I posted a while ago about flying anxiety and had some really helpful responses. I've managed to get some valium from my doctor (my flight is jus. And steer clear from the 'take a larger dose at once' - you do actually want to be awake at. Jul 16, - Diazepam/Valium for fear of flying - Air Travel Forum my experience taking Diazepam prescribed to me by my GP for my fear of flying. Well as usual when I'm approaching the date of my flight, my anxiety builds up and I. I take one tablet an hour before I got on the plane and was really, really chilled out. you couldn't have a panic attack if you have the right dose of valium.