From my research it sounds like you don't need to do anything in advance like you do with Japan, but I did see something about having a letter from your doctor in addition to having it in the original bottle from the pharmacy. My doctor wrote a copy of the prescription down on a prescription pad with "take once daily at bedtime for insomnia" on it. Will that suffice or are they looking for an actual letter? And is the same thing when leaving the country with the zolpidem or do you need to submit an export form like with Japan?