✔ 最佳答案
I don't know why these answers exist.
Viagra is not a controlled substance per se in any countries.
However, it is still a prescription-only medication (a doctor's note is required).
So you can bring it with you travel, providing that the medication has any label showing that the doctor prescribes that to you. A doctor's note can work as well.
Basically, you have to show you are the legal owner of the medication.