I have ADHD, and for this I use stimulant medication (similar to Ritalin), which in New Zealand at least holds a class of restriction higher than regular prescribed medications (it requires a Ministry of Health special authority number, which is given by a psychiatrist).
I'm moving to Australia, and I've got a letter from my psychiatrist to give to Australian Customs.
But what I'm wondering is, if I'm flying between New Zealand and Australia regularly, am I going to need to declare my medication every time?