Hmmm, interesting. I thought Mexican Coke was made from the coca plant, which is mostly grown in Colombia, Bolivia, and Peru.
Actually, originally there was cocaine in Coke. Hence the name. When I was a child my mother could go to the drug store and get a small vile of morphene which she gave to my sister who had painful periods. She had to sign for it, if I recall. Then, WAR ON DRUGS!!!