I travel internationally a lot, and carry Test, HCG, and Sermorelin in my carry on bag. To make things even more interesting, my HCG and Sermorelin vials are stored in a cold pack in that carry on bag. My insulin pins and alcohol wipes are in a small tupperware bin in my large checked bag. To this date, I have never, ever been questioned entering or exiting China, Japan, Taiwan, Hong Kong, Malaysia, the Philippines, South Korea, or Germany. The only place where they physically opened my cold pack, and looked at my meds was in the USA. This was after I told them they were injectable meds, and to please be careful handling them. They didn't ask for any prescriptions...they just apologized, and sent me on my way.
Just in case, I carry the original boxes with the prescription labels (HCG and Sermorelin), the original plastic container with label for the Test (since it is a controlled substance), and a travel letter from Defy Medical.
Sorry for the thread creep.