Pseudoephedrine was a massive source of meth a decade or two ago. https://www.nbcnews.com/id/wbna28802912 https://www.nbcnews.com/id/wbna28802912 "Mexican aut

Pseudoephedrine was a massive source of meth a decade or two ago. https://www.nbcnews.com/id/wbna28802912 https://www.nbcnews.com/id/wbna28802912 "Mexican authorities said they have seized nearly 3 tons of pseudoephedrine from a ship that arrived from South Korea."