Even though I knew I had to start jumping through hoops to buy 'real' Sudafed in the US, for some reason I completely blanked about taking it overseas. I didn't lump it with hard-core pain pill drugs.

So I took my Sudafed tabs to Japan twice. Once there was a pretty thorough bag search at boarding, but fortunately they didn't investigate my pills. Their attention was captured by an unlabelled clear-plastic squeeze bottle (lens cleaner for my camera).

I'm not aware of any other country that takes Sudafed so seriously (other than, perhaps, the US).