Something worth noting, when travelling to different countries is to take copies of any prescriptions with you, so the authourties and customs have some chance of understanding your pill bottles.
Check foreign regulations and be aware that your medicines may not be obtainable, even if you have documentation if the pharmacy authoraties have not approved them.
I went to Japan a year ago. Before I went, I found,that some of the drugs I am on are classed as a controlled substances, and so had to get appropriate paperwork to take in with me.
I never wear my TENS machine through customs... The possibility of being accidentally shot for having a strange device with wires attached to me does not appeal.