I had a prescription back in the US but ran out ages ago (I only brought like 20 pills with me). I never heard of the PDEA requirements and was lucky. I just brought mine in with a copy of the prescription - was lucky nobody ever checked my bags.
I asked about Lorazepam at a pharmacy and the pharmacist freaked out... I looked it up on a Filipino medication guide and they list it as a roofie. Absolutely stupid - but true. It will likely be hard to get a prescription here for it.