oh and just to adda bout gum...
my then 15 MO son and I flew frequently and I could never get him to not swollow the gum, so I started to travel with tootsie rolls instead. I gave them ON THE RUNWAY (Not when you push off). First plane trip at 14 months - ear plugs. 2 at 15 months one with gum that was swollowed then return trip tried the tootsie rolls, the other was tootsie roll both ways, and he and I have flown 2 more round trips since.
I give him another one when the captain announces "FInal approach".
I've tried the ear plugs, and while they seemed to work, they are pointless unless you (ANd she) intend to keep them on the entire flight. My DS didn't mind them the first time, but my 2 DD diid not like them at all and abandoded them on our layover. WIth youngsters they don't always leave them alone, so I found the tootsie rolls to wrok better for us!
And yes, its been said, but you do not have to refridgerate you rmeds, just make sure its in the original package and you have proof that your DD is who is on the bottle. My son was travelling with Tylenol with Codine, and had his own ticket.
Enjoy your trip and I hope your DD feels better in no time!!