If you are currently taking medication, be sure to take enough for the entire duration of your stay.  You most likely will not be able to find the same medication overseas and it is usually ILLEGAL to have medication shipped to you from the United States or for another person to carry it across a border for you. For customs purposes, it is advisable to leave all prescriptions in their original labeled containers.  Also, keep an original copy of the doctor's prescription with your passport.  These measures should assist your processing through customs and insure that you won't break any laws of the country you are entering.  If the medication you are taking contains narcotic substances, you may want to consult your program manager, provider, or the consulate of the country where you will be studying to see if it’s legal, i.e Adderal, Ritalin.