I also called my doc, and told him I had an 11 hour flight after which I had to get off the plane at 10am and work all day, and so I had to sleep, which I never am able to do on the 6 to 7 hour flights I take to Europe.
He gave me a script for Zolpidem 10mg which is the USA generic for Ambien, along with an instruction to try a half a pill one night, and a whole pill a few nights later before my flight.
It worked like a charm on an 11 hour flight from Chicago to Buenos Aires, I was out right after wheels up and slept about 8 hours like a rock. Got off the plane rested and refreshed, went to work, had a full and productive day, and was quite happy about the whole thing.
Back to the original question, why would you concoct a story for a doctor who is prescribing you a medication? Don't you want the right med for the right purpose?