You should not be flying with an ear infection at all by the way. Done that once and it was the most painful experience in my life.

I have crossed the AU border with loads of Ritalin in my carry on and it never occured to me to declare them. Will do so again in December, with a 5 month supply no less. I carry a written doctor's statement that I need the medication blah blah blah but I never needed it.