I'm from the US, if I go to another country and get a Dr.'s prescription for test or other compounds, is it legal to bring the test into the US or will Customs keep it for themselves if they discover it? I tried looking it up on DEA diversion control and CBP's website, I found something on there that makes me think it would be illegal but it doesn't address my question exactly, its kinda vague. Does anyone have any experience or knowledge of this?