Don't wear any type of patch until you get through security as Catra said. I've had the TSA insist on swabbing me and not allow me to remove it, so they're essentially lightly rubbing the most sensitive area of your body.

Hopefully your connecting flight won't be too tight? Otherwise you absolutely want to be the last off.

If you get to the airport early, you might want to check the cost of upgrading to first class. It's a fraction of the cost by doing it that way and the seats provide much better cushioning from vibration.

You're not supposed to use medical tape on Lidoderm patches, but if you do it lightly it's helpful to keep them in place.