If you are currently taking any prescription medicines, ask your
physician whether you can take along a supply adequate for your stay
abroad, as it is not possible to fill U.S. prescriptions in other
countries. If it is possible, be sure to keep your medication in its
original packaging and take a copy of the prescription with you for
custom officials. Also, it would be a good idea to carry a letter
from your physician indicating the names, including the generic names
and the ingredient lists, of the medications and the reason for each
medication, not only will the letter help you if you get asked
questions upon entering the country but also if you need to see a
doctor while abroad. The medications and any documentation from your
physician should be packed in your carry on luggage.
If it is not possible to take such a supply (because of limitations of your insurance or because of the shelf life of the medications), you may need to have your medications express mailed (FedEx or DHL) to you while you are away. Since some drugs now commonly prescribed in the U.S., such as Ritalin and Adderall, are banned in some countries, it is a good idea to check with your program to make sure that you can bring your prescription medications legally into your host county. If you suffer from allergies, be especially sure to take an adequate supply of medication. Big cities may even have more airborne pollutants than you are used to and may trigger severe reactions.