Absolutely check with the doctor, however every one of my friend’s pediatricians recommended Benedryl for their children on flights. I would try it at home first to see the reaction (for allergies and because the dye can make children hyper as it did for me) Taking your argument, you should refrain from giving them water as too much water can kill too.
Frankly i don’t foresee it as a problem since I don’t plan on taking my children on an airplane until they are old enough to handle it. An emergency may come up that will need flight, but frankly it’s not worth the aggrevation and inconvenience to others. My children, my responsiblity - I will do the utmost in my power to make sure others aren’t inconvienced by that, unlike most on this thread.
kids...young kids and babies can handle being on a plane just fine.
99% of the people on the plane realize a kid might find things a bit uncomfortable and will allow for some “forgiveness”. its the 1% unexperienced that get all pissy about it.