Suppose that someone has ADHD (attention deficit hyperactivity disorder) and is prescribed concerta (ritalin/methylphenidate) in Poland, or some other condition that is treated with a prescription drug that is a controlled substance in some countries, and wants to travel around Europe in a camper van.

The concern is that legal problems could arise from possession of the prescribed controlled substance.

Preliminary research has revealed that:

• To take the medication out of Poland this person would need a letter from a doctor.
• This person then has to get separate form from a government official authorizing the letter.
• The paperwork expires after 30 days and will need renewing every time a prescription is collected.
• When entering/transiting through a European country they all have their own separate procedures, which could potentially be as arduous as the Polish one.

This is all quite piecemeal, will be a lot of hassle and is quite discriminatory. Is there no European wide solution to this?