Have the certificate for taking narcotics with you when traveling abroad notarized
Source: BUS Rheinland-PfalzTaking narcotics abroad as a patient
As a patient, you may export or import narcotics in the appropriate quantity for the duration of your trip as a travel requirement.
When traveling for up to 30 days in member states of the Schengen Agreement, you may take narcotics prescribed by a doctor with you, provided you have a certificate completed by your attending physician. You must have this certificate notarized before you start your journey. You will need a separate certificate for each narcotic prescribed.
This regulation also applies if you are carrying narcotics that can be prescribed in the country of origin but not in the country of destination.
Only you personally may carry the narcotics with the corresponding documents. It is not permitted for a person authorized by you to carry them.
When traveling outside the "Schengen area", you should clarify the legal situation in the country to be visited with the relevant diplomatic representation of the country of destination in Germany before starting your trip. In certain cases, you must obtain a multilingual certificate from your doctor. The certificate contains information on individual and daily dosages, the name of the active substance and the duration of the trip.
If you are carrying certain substitution drugs, such as methadone or buprenorphine, you should also enquire with the relevant diplomatic representation of the country of travel in Germany before you travel.
Taking narcotics abroad as a doctor
As a doctor, dentist or veterinary surgeon, you are permitted to take narcotics with you on charitable missions abroad, such as for Médecins Sans Frontières, or as medical practice supplies in cross-border traffic. Please contact the diplomatic representation of the country you are traveling to in good time to find out whether you can take the narcotics with you and whether you need a permit to do so.
You must be able to identify yourself with a doctor's ID.