AFAIK with any medication that's illegal in another country, you'd need to request an official paper that states the medical reason for said medication. Example: I need to ask for a special paper for border control for my vacation to Turkey this year, because i got Dexamphetamine as medication, which is classified as an illegal hard drug outside medical purposes. My point: a doctor's note would not excuse the above. It requires a different document (but your doctor should be able to get one