Published by alaz ltd.
Customs rules name substances, not products. Sudafed is pseudoephedrine in one country and a different formula in another; Adderall is amphetamine salts wherever it is sold. We resolve the product to its active ingredient first, then look the ingredient up. That is why a brand you consider harmless can still be refused entry.
Three layers, in this order:
1. UN scheduling. The INCB Yellow, Green and Red Lists record which substances are under international control. This layer is stable and we state it plainly.
2. National guidance. Japan MHLW, Singapore HSA, UAE MOHAP, Saudi SFDA, UK Home Office, and equivalent authorities elsewhere. Where a page exists we link it directly on the answer.
3. Nothing. When neither layer covers a combination we say the restriction could not be confirmed, and we do not guess. A blank is not a yes.
It cannot tell you that you will be let through. Officers apply discretion, quantity limits and documentation rules that no public page fully captures. It cannot account for dose, formulation, or how much you carry — a quantity that is fine for personal use may be treated as import. It is not medical advice and not legal advice. It is a starting point for the question you then put to the destination's own authority.
Rules change without notice and our pages lag. If you find an answer that no longer matches an official source, the official source wins. Treat anything here that contradicts an embassy or health ministry as out of date.