canada, as a good leftist country bans all sorts of stuff that is OTC in the US.
and yes, PH's are part of their bigbrotherconfiscation(tm) list
however, you pretty much have carte blanche to shoot heroin if you go to the combat zone of vancouver, where it has essentially been legalized (not enforced)
so, you can shoot heroin, but you can't take yohimbine
oh canada