I've got an overnight flight coming up and I'd really like to get some sleep.

I normally take Ambien about twice a week taking only 5mg, and it does the job.

However, in the past I've taken as much as 10mg of Ambien on a plane and I still barely sleep at all. I think not being horizontal is my biggest issue.

My question: could I take more Ambien to get me to sleep or is there some other drug or am I playing with fire, and should instead just live without sleeping on the plane?